Happy, or "Hap" as called by SOA members is an for the Sons of Anarchy Motorcycle Club, and, along with Tig Trager, is commonly used to carry out the club's murders. He is from Tacoma, Washington but frequently visits the club's charter in Charming, California where he has a good relationship with the President, Clay Morrow. Hap mentions that his mother is from Bakersfield. A heartless assassin, he has been shown to enjoy acts of violence that even other members of the club are disturbed by. He has a Smiley tattooed on him every time he kills someone. On his cut, he wears patches reading "Sgt. At Arms", "Unholy Ones", "Men Of Mayhem", and "In Memory of Opie".
''Sons of Anarchy''
Season 1
Happy first appears in the pilot episode at a club meeting. The Mayans, a rival motorcycle gang, had stolen the club's guns and burned down their weapons storage warehouse. However, Juice Ortiz, the club's intelligence officer, had located the guns in San Leandro, and the following night, Jax Teller, Tig Trager, Chibs Telford, and Clay Morrow stole the guns back from an industrial storage warehouse. They also destroyed the warehouse and a heroin factory. Happy kills Esai Álvarez, the son of the Mayans President Marcus Álvarez, as payback for the Mayans' attempted hits on Clay and Ernest Darby. Esai's father sanctioned the hit in a jail-house deal with Clay in exchange for SAMCRO's selling guns to the Mayans. Happy pretended to be a churro vendor, and when Esai approached his stall, Happy stabbed him in the back of the neck with a knife. Happy is also seen in the closing moments of the episode, getting his 11th Smiley tattoo, documentimg Esai's murder. Happy states in the episode "Better Half" that his sick mother lives in Bakersfield, and that he is thinking of "going nomad" for a while to take care of her. Clay's response to that statement is, "There's always a seat at that table for you." Happy drove Cherry and Cameron Hayes to Canada in one of Chief Unser's trucks at the end of this episode. In the final episode of the season, "The Revelator", Happy goes with Chibs and Tig to San Joaquin to kill the witness who identified Bobby Munson and Opie after the murder of Brenan Hefner. The safe house was being guarded by two sheriffs and a female ATF agent, but the trio managed to knock all three unconscious and gain entry to the house. When Tig saw that the witness was a teenage girl, he had initial doubts about killing her, and Happy showed his cold-bloodedness by offering to kill her instead. However, Tig stepped up, but just before he shot her, Jax came in and stopped him doing so at gunpoint. Jax then told Chibs and Happy to leave, and beat Tig up for killing Donna. Later in the episode, Happy, as well as Sons of Anarchy members from across the country, attended the funeral of Opie Winston's wife Donna, whom Tig had mistakenly killed.
Season 2
At the beginning of the season, Happy has gone nomad but often returns to Charming to help the club. Since Chibs' near-fatal injury, Happy has been present at all of SAMCRO's dealings, possibly filling in until Chibs is well again. Happy was arrested, along with most members of SAMCRO, when they accidentally raid a Christian retreat and fall into a trap set by a White supremacy group. He served time in prison with fellow members Clay, Tig, Juice, Bobby, and Jax. At the end of the episode, he and the others are released.
Season 3
At the beginning of season 3, Happy is very involved with SAMCRO affairs, still providing muscle while SAMCRO tackles the aftermath of Abel 's kidnapping. During Half-Sack's funeral, Chibs mentions that Happy will be transferring to SAMCRO. Happy goes with Piney and Bobby to get medicine for his sick mother, but is cornered by hillbillies who are trying to steal the illegal meds from Piney's friend. When the hillbillies try to make a deal with them the SOA fires at them, because they realize she supplies clinics. With help from SAMCRO Happy, Piney, and Bobby are all safe. In the episode "The Push", Happy is patched in as an official SAMCRO member. In the next episode Happy accompanied SAMCRO to Belfast. When SAMCRO is arrested by officers and almost deported, the kidnappers interrogate them about who hired them. Jax tells Happy to kill one of the men, and Happy replies "Oh yes I will", but is stopped. A look into his dark mind is displayed when Liam O'Neill is being brutally tortured; Happy looks on in sheer delight while everyone else is visibly shaken. Happy is arrested with Jax, Clay, Tig, Bobby, and Juice in the season finale, and like the others, upon learning Jax ratted, has a look of hate on his face. When it is revealed SOA knew, and it was a Club plan, Hap laughs with the others.
Season 4
In the premiere, Happy and the other members are released. Happy and Tig love the "Jellybean", a strip club not known for the best or most hygienic dancers, where the Russians like to do business. Juice replies, "the freak circle is complete." Later in the premiere while being followed by two officers, Happy serves as a distraction by kicking the side of the patrol car, which is what had gets them in custody later. In "Custody", on the side of the road, it's revealed Happy reuses condoms. He defends himself saying he's not cheap, just "mindful of excessive spending", which comes ip again in season 3, when he tells Clay his mother's medication is very costly and giving him money troubles, another reason he's willing to do runs and hits. Later in the same episode, Happy Juice, Bobby, and Chibs leave Opie and Lyla's wedding early to get their guns from the Russians and kill them. This is Juice's first kill for the club. Happy and Kozik are only mentioned in the next episode. In season 4 episode 3, Happy votes against becoming involved with the cartel, saying, "I'm sorry, but I'm a No." In episode 3, it is revealed that he is a neat freak. In "With An X", when one of the bricks of the cartel's cocaine is stolen, Happy helps interrogate the prospects, pretending to bash Miles' hands with a hammer and locking them in a room with a loaded gun. When the thief is seemingly revealed to be Miles, Happy shoots his body, calling him, "a lying bitch", and confirms to Clay that "he was VERY dead." When Clay is shot, supposedly by the Niners Happy agrees with Tig's attempted murder of Laroy, stating, "he's gotta to die, like A LOT." In the finale, Happy is seen at a SAMCO meeting, taking Opie's old seat at the clubhouse table.
Season 5
Happy is seen with the rest of the club in the season premiere when their shipment of cocaine is attacked by Niners, in revenge for Tig's murder of Laroy's girlfriend Veronica Pope. Happy is unintimidated by Roosevelt's threats to control their problems, to prevent them from hurting Charming, or he will call in Gang Task Force. When Opie is killed by black prisoners while inside, on orders of Veronica's father Damon Pope, Happy is present at his wake. Happy is later seen again in "Andare Pescare" helping Jax, Tig, Chibs, and Bobby track the man who beat Opie to death, who's revealed to be the cousin of the Grim Bastards MC President T.O. Cross. When Tig suggests tracking down the man themselves and bashing his head in, Happy states "Second that". In "To Thine Own Self" Happy is present during the dispute with Nero's old gang and accompanies Jax, Chibs, and Tig to meet with them. When they get into a high-speed chase/shootout, Happy's head is grazed by a bullet; he is shown to not be seriously injured and gets a thrill out of getting shot.
Season 6
Happy has become the new sergeant-at-arms after Bobby's resignation as Vice President and Chibs' promotion. Happy is taken by the Chinese, to be held captive until they receive the second-in-command for the IRA. He later kills the Chinese and receives another smiley tattoo for killing a rat for Caccuza.
Season 7
''Mayans M.C.''
Season 1
Happy makes his debut in the season finale: "Cuervo/Tz'ikb'uul", wherein it is revealed Happy killed Marisol Reyes, the mother of the series protagonist Ezekiel "EZ" Reyes and his brother Angel Reyes.
Season 2
EZ comes closer to cracking into Happy Lowman's involvement with killing operations for SAMCRO, including the murder of his own mother. In the second episode, EZ reveals the truth to his brother Angel about their mother's death and that he got information on the side about her killer; Happy Lowman, and his history with SAMCRO. Angel and EZ travel to Charming and break into Happy's house, holding him at gunpoint. The Reyes brothers try to get answers from a tied up Happy, but he refuses to speak until they threaten his dog, Opie. He explains the hit was for both their parents and that the order came from Mexico. He promises to get more information from his contact and that they will be even.
