Hal is the editor and co-owner of the local newspaper, which he runs with his wife Alice Cooper, and the father of Betty and Polly Cooper. He holds a fanatical hatred for the Blossom Family, due to a feud that occurred a few generations back and abhors his own unborn grandchildren. He is also soon to be the grandfather of Jason and Polly's twin babies.
Prior to the start of the series, Hal married and later had two daughters, named Betty and Polly, with his high school sweetheart, Alice Cooper. Hal and Betty would often spend time together by working on vehicles.
During his high school years, Alice, who was simply his girlfriend at the time became pregnant. Hal pushed her to have an abortion, as he believed it was the best option considering that she was not ready to be a mother. Alice refused an abortion and instead gave the baby up for adoption once he was born.
Hal also owns the local newspaper, The Register, alongside his wife. Due to his family's history with the Blossom family, he harbors a deep hatred for members of the Blossom family.
Hal stood alongside Alice, as the local authorities brought Penelope, Cliff and Cheryl Blossom up to the shore of Sweetwater River, just after the mysterious drowning of Jason Blossom. The following week, he returned to the shore with his wife and daughter, they were forced to stand by as Jason's body was brought to land.
Before leaving their home, Hal and Alice told Betty that it would be a long night for them. Alice corrected him as there'll be a lot of long nights due to Jason Blossom's murder. Hal found his wife's tone to be a little unsettling, as it almost sounded like joy. However, Alice was unconcerned with his opinion.
Hal and Alice attended the first annual Taste of Riverdale, in celebration for the upcoming 75th anniversary of their town. Once there, Hal was forced to assist in breaking up a violent altercation between his wife and Penelope Blossom.
Hal and Alice knocked on the door of the Andrews house, he first apologized to Fred Andrews for coming unannounced, but it's been a rough couple months for them. Before Hal could finish his sentence, Alice cut him off, she insisted that Archie and Betty stop spending time together. The relationship is toxic, on both sides, and their recent behavior reflects that, or so Alice claimed.
While Alice was off at a women and journalism spa retreat, Hal took the opportunity to work on his car, however, that was halted as Betty entered the garage, wanting to talk about Polly. Hal explained that Jason and Polly had a fight, he was unsure what the fight was about, but Polly was devastated afterward. He came home from work one day and heard the water running in the bathroom, so he knocked on the door, asking Polly if she was okay, but she didn't reply. Hal then kicked the door down to find a suicidal Polly attempting to commit suicide, this is why she was sent away. After a heartbreaking talk with Betty, Hal proceeded to watch old home movies of Polly that night, while drinking his sorrow away.
Hal later attended Jason Blossom's Memorial, where he had a run-in with Cliff Blossom, they had a brief exchange of words in what looked like a heated conversation from Betty's view, and went their separate ways.
Coopers vs Blossoms
Once home, Betty confronted him with the news that Polly was engaged to Jason, however, Hal was already aware of this, it goes back to what he and Clifford were arguing about, which was their families, the Blossom clan came extremely close to destroying his family. Cheryl's great-grandfather murdered his grandfather over money. They were business partners in selling and trading maple, but one day, Cheryl's great-grandfather decided that he no longer wanted to share the profits, so he murdered Hal's grandfather. The Blossoms stole their livelihood, he'd die before he allows them to steal his daughter too, Jason made her sick, so she's not returning home until she's no longer sick. He warned Betty to stay out of it. By the end of it all, Betty had come to the conclusion that Hal was the culprit that broke into Sheriff Keller's house and stole the evidence regarding Jason Blossom's death.
Having learned that Betty and Jughead secretly visited Polly at the Sisters of Quiet Mercy, he questioned if Betty had found what she was looking for while she was there. Much to her disappointment, she didn't. However, that didn't stop Hal from being the target of Betty's suspicions. He hated the Blossom family for stealing the Cooper family legacy, as well as Polly being pregnant with Jason's child, which gave Hal motive. Hal did not attend closing night for the Twilight Drive-In, nor was he with Alice, which that led Betty to believe that he was not only the culprit that broke into Sheriff Keller's house, and stole all the case files on Jason's murder, but that he might have been the person who killed him. Hal and Alice accused Betty of sounding just as crazy as Polly, who Hal claimed was depressed and delusional, and her story about running off with Jason, just a fantasy.
Hal, Alice, Betty, and many other residents of Riverdale orchestrated a search party in an effort to find Polly. They began in the Eversgreen Forest, and headed East since that's the direction Polly would have gone in if she wanted to leave town unnoticed. After a run-in with the Blossoms, Alice announced to the town that Polly was pregnant with Jason's child.
The next morning, he and Alice were asked a number of questions by Betty, such as if Polly and the baby would be staying with them at the house. Hal and Alice lied to Betty, they told her that Polly decided to give the child up for adoption as it was the only option, however, Betty already knew that they weren't telling her the truth as she had secretly found Polly the night before.
Appointments & Altercations
Following Polly's baby shower, which he did not attend, Hal, while watching a baseball game, was confronted by Alice, who had learned that Hal made an appointment with a doctor to get Polly an abortion after learning of her pregnancy with Jason Blossom's child, which he kept secret from Alice. In the ensuing argument, Hal insisted that sending Polly to the Sisters of Quiet Mercy wasn't enough because the child belonged to the Blossoms. When Alice demanded that Polly is brought back home, Hal lost his temper and insisted that he will not be raising a child with Blossom blood. Outraged, Alice threw Hal out the Cooper household for neglecting their daughter.
Later, Alice and Betty came to Hal at The Register, where they presented him with a USB flash drive that contained a tell-all exposé of the corruption surrounding the Blossom family. Alice and Betty explained that they want to make the Blossoms to answer for all the harm they had caused, including for taking Polly, who was currently residing at Thornhill. However, Hal refused to publish Alice's article, which would benefit her personal grudges. Having been bitter after getting kicked out of the house by Alice, Hal changed the login password for the Registers' computer, so that Alice could not use it. Hal explained to Alice that he is firing her from the paper as retaliation for being kicked out of the house. Enraged that Hal is holding her back again, Alice destroys his front glass door with a rock. 
Under the wrongful impression given to him by Betty, Hal assumed his presence was requested by Alice for dinner she was hosting for FP and his son, Jughead. Unfortunately for Hal, Alice was completely unaware that he would be attending the dinner up until his unexpected arrival. Reluctantly, Alice offered him a seat. Hal mentioned that he had been hoping at the possibilities of there being vacancies down at the Sunnyside Trailer Park, where FP resided, because he had been sleeping at The Register ever since Alice kicked him out, and it was starting to get a bit cold at night. FP joked that Hal's office was likely more comfortable than the trailer park, but Hal disagreed.
He told them about Alice's redecorating of the office, a reference to her throwing a brick through the front window. With Betty and Jughead attending their Homecoming later that night, FP recalled their Homecoming night, in which Hal and Alice were crowned King and Queen, but it's what took place before the crowning that FP had revealed. He overheard Alice and Hal screaming at each other, he didn't know what they were fighting about, but it sounded serious.
Destroyed Evidence & Parted Bloodlines
After learning that FP Jones was arrested for the murder of Jason Blossom, Hal crept back into his house in the middle of the night to destroy the evidence he had previously stolen from Sheriff Keller's house. Unfortunately, he accidentally woke up Alice and Betty as he was rummaging through the files, leading to an altercation in which Alice pointed a gun at him while under the impression that he was an intruder. After revealing his identity, Hal cleared up the matter. Alice pointed out the unlikelihood of him having broken into the Sheriff's house as FP had already admitted to that, which Hal noted as being strange since he's was the culprit. He explained that he was worried that the investigation would lead back to Polly, and that Sheriff Keller would somehow put together the on-going feud between their family and the Blossoms. Hal then revealed that Betty's great-grandfather wasn't just murdered by a Blossom, he actually was one.
After the murder, his family severed ties with the Blossoms and their name, eventually taking a new one; Cooper. Hal, Betty, and Polly were all Blossoms by blood, which made Polly and Jason relatives, third cousins to be exact, and this is why he wanted to terminate the pregnancy, as their relationship was technically incest. They began to wonder if Hal would go that far to keep them apart, how far would the Blossoms go, so they rushed over to Thornhill to retrieve Polly. Before taking Polly home, Hal questioned the mental stability of Clifford and Penelope as they were perfectly fine with the incest that had taken place between Jason and Polly.
Just days after the suicide of Clifford Blossom, and the revelation that he was responsible for the murder of his own son, Jason Blossom, the Coopers went back to their regular routine life. Hal had returned home, and they were all acting as if the last few months never happened. They smiled, and talked about the 75th Anniversary Jubilee, pretending to be a perfectly normal family by avoiding any discussions of the secrets and revelations that had flooded the town.
At The Register, he and Alice were handed an article by Betty, pertaining to FP Jones' arrest. He and Alice agreed that while it was the best thing Betty had written, they didn't believe it should be published for a number of reasons. Not only would people think that she was simply doing it for her boyfriend, Jughead, but there was also the concern for her well-being. There were reports of attacks on the south side, law enforcement and residents were gunning for the Serpents, and crime was on the rise. There was a lot of anger flowing through town, and at the moment, it was directed at the Serpents, so Hal and Alice didn't want the rage to turn towards Betty.
A couple days later, he attended the Jubilee with Alice and Polly. The three of them sat in the crowd as Betty got on stage and discussed the town's deepest problems, and how they weren't being addressed.
After hearing that Fred had been shot at Pop's shoppe by an unknown black hooded assailant, Hal, Alice, and Betty rushed over to Riverdale General Hospital, where Fred was undergoing surgery. To no surprise, they are met by Jughead, Veronica, and Hermione. They entered the lobby to find Archie pacing back and forth, covered in his father's blood. As the kids embraced, Hal, Alice, and Hermione checked in with the nursing station. While Archie headed into the hallway to call his mother, and inform her of Fred's shooting, Alice accused the Southside Serpents of potentially being involved, and looked to Jughead for answers. In consideration of everything that was going on, Hal whispered to her that now was not the time.
Once Archie returned from questioning with Sheriff Keller about his father's shooting, Fred's doctor entered the lobby to inform them that they got the bullet out and stopped the internal bleeding. However, Fred wasn't breathing on his own yet, which was quite worrisome. As soon as the doctors get him situated in a room, Archie will be allowed to sit with him. Until then, everyone urged Archie to go home, and get changed.
Hal briefly appeared in one of Fred's dream-like hallucinations following the shooting. He sat alongside Alice in the crowd at Archie and Veronica's Scottish themed wedding.
Fan Mail from the Black Hood
Hal and Alice greeted Betty as she returned home from school that evening. He claimed that the envelope that Betty had brought in earlier that morning from the front porch was "fan mail" from the shooter, who was calling himself the Black Hood. He wanted them to publish his letter claiming responsibility for the shootings of Fred Andrews, Moose Mason, and Midge Klump, as well as the murder of Geraldine Grundy in Greendale. As proof that he is who he says he is and that the letter is from the actual killer, inside the envelope was Fred's missing wallet and Geraldine's glasses.
Hal and Alice then headed down to the Mayor's office, where they turned the evidence over to Mayor McCoy and Sheriff Keller. In the spirit of public safety, Mayor McCoy suggested that they refrain from publishing the letter. However, Hal and Alice felt it was their responsibility to inform the public that there was a killer freely walking about Riverdale, targeting his next victim. Printing such an article would cause town-wide panic, Sheriff Keller said. He requested a media black-out for at least the next twenty-four hours. He'd be taking the letter into evidence, but claimed that he would send them a copy afterwards. However, there was no need for such doing. Hal and Alice had made their own copy just before sending it to the printer for tomorrow's front page.
The next day, Hal and Alice were approached by Polly, who after reading their published article of the Black Hood's letter in the Register, decided that she would be leaving Riverdale for her own safety. She had already made arrangements at the Farm. What Farm, Alice wondered. Polly explained that she was referring to the very same Farm that she and Jason had planned to run off to before he was murdered. Hal suggested that Polly settle down, so that they can talk about what to do next. Polly was worried about her well being, as well as the well being of her unborn babies. With the killer targeting sinners, she was no longer safe in Riverdale considering that she was an unwed mother carrying her cousin's babies. Over Alice's dead body would she allow Polly to run off and give birth at a Farm, though she didn't have much say in the matter as Polly had already made up her mind. She stormed off, with Hal not far behind, hoping to talk some sense into her.
With the Black Hood still free to target the residents of Riverdale, Hal and Alice took precautions in order to ensure the safety of their family by installing brand new locks on the door.
The next morning, he and Alice learned that with Betty's help, Polly ran away to the farm. Betty's reasoning for lying to them and helping Polly leave was that Polly was safe from the killer's grasps at the farm, where only they knew she would be. Betty explained that she assisted Polly because she was scared, as was Alice, who was admittedly terrified that every time Betty walked out the door or didn't answer her phone, that something terrible had happened to her. Alice attempted to explain that its the things they do in secrecy that make it so difficult for them to protect Betty and Polly.
Two days had passed since their discussion with Betty, and so Hal and Alice attended the Town Hall meeting, where Mayor McCoy welcomed all to the event in hopes that she could address their concerns and if possible, ease their minds, as she too shared their desire to protect their town and their children. Mayor McCoy and Sheriff Keller then announced the introduction of a town-wide curfew and helpline that residents can call to report any suspicious activity. Alice questioned the legitimacy of the so-called helpline, connecting it to the Red Circle. She was wondering when they were going to address the real problem in Riverdale, which is the south side. This resulted in a heavy debate between her and Fred as the two argued over how best to handle the problem, which only came to an end after Betty and Jughead interrupted the meeting to announce the supposed arrival of the Black Hood.
With the Town Hall meeting brought to an abrupt end, Hal, Alice, Betty, Jughead, Sheriff Keller, and Mayor McCoy reconvened at the Cooper's house, where they hoped to gain a better understand of how Betty and Jughead knew where the Black Hood would strike next. Betty handed them the letter, which was sent to her by the Black Hood, along with the cipher that she had earlier turned over to Alice, revealing that she had withheld evidence from them in an attempt to solve the cipher herself.
Hal was furious with Betty after learning that she published an archived article at the Blue and Gold of Alice's arrest from many years ago, when she was a young member of the Southside Serpents. He couldn't comprehend why Betty would do such a thing. Alice explained that it was revenge, though Betty claimed that it was justice against her and her holier-than-thou attitude.
A couple days later, Hal attended the Lodges' SoDale Gala Opening, where he became reacquainted with an old friend; Hiram Lodge. Just between the two, Hal told Hiram that the article Betty published of Alice's mugshot, took a toll on her, so they both decided it would be best if he covered the event alone.
Much to Hal's surprise, Alice showed up at the event, wearing a red snake print dress and a golden snake-shaped necklace, leaving guests astonished. She breezed past Hal, telling him to shut it, before he could even get out a single word.
Later on in the evening, he stood alongside Alice, as Hiram gave his speech, promising to reinvent Riverdale.
Hal received a call from Sheriff Keller, telling him to come down to the Sheriff Station after he had caught Betty breaking into his house, and rummaging through his home office for proof that the Sheriff was the Black Hood. Hal apologized for Betty's actions as he couldn't image where she could've gotten the idea from. Given that Betty found his research on the case and the black hood that he had confiscated from Archie's locker, the Sheriff wrote it off as Betty being driven by her overactive imagination. Just in case that Betty still suspected him of being involved in the attacks, Sheriff Keller handed her his logbook, which documented his whereabouts for each attack. Fortunately Sheriff Keller had decided not to say anything to Kevin about the incident due to the fact that Betty had been a good friend to him, and that it would break his heart.
Hal briefly appeared in Betty's anxiety induced nightmare along with Alice and Polly. The three of them gathered in the living room by the fire place, as Betty came down the steps. They wished her a Merry Christmas. Moments later, Hal was dead, as were Alice and Polly. In Betty's nightmare, they had been murdered by the Black Hood.
In reality, on the night of Christmas Eve, Hal and Fred were called down to Pop's by Sheriff Keller after Betty and Archie were attacked by the Black Hood. Fortunately, the Sheriff managed to kill the Black Hood before he could escape.
Hal and Alice learned from Betty that Polly gave birth to the twins at the Farm. As Hal tried to cope with the news, Alice struggled to hold back her tears. Hal questioned why Polly hadn't informed them of this. Alice surmised that Polly didn't want them to be apart of the babies' lives. Alice then asked Betty if Polly was alright and if the children were healthy. Betty reassured her, stating that Polly is fine and the babies are healthy. Betty revealed that this wasn't all she had to share. After some digging, she found an address for Alice's son and her biological brother, that was given up for adoption many years ago. His name was Charles Smith. With Polly gone, Betty assumed that this would better their lives, but Hal would beg to differ. He scolded Betty for prying into something that had nothing to do with her or Polly. Betty exclaimed that she did it for her mother, though she was clearly upset by the recent revelation, Alice agreed with Hal, deciding then that it was best to end the conversation.
The following evening, as Hal and Alice sat in the living room, reading books, Betty returned home with Chic hanging over her shoulder. She called out to them for help as Chic's arm had been sliced open. Hal, Alice and Betty took Chic to the kitchen, where they grabbed the first aid kit and applied medical care.
Afterward, they laid him down in Polly's room to rest for the night. Hal stood by the doorway as Alice comforted him and explained that they had a lot to talk about.
Hal is a middle-aged man of average height, around 5' 11", with a muscular build. He has tan skin, blue eyes and blonde hair. Like his wife, Alice, Hal is typically dressed in professional clothing, suits or collared shirts and vests.