Tina Porter-Kennard is a fictional character played by Laurel Holloman on the Showtime television network series The L Word and The L Word: Generation Q. Tina lives in Los Angeles, California, and spends her free time in West Hollywood. She is the mother of Angelica Porter-Kennard and initially the life partner of Bette Porter (Jennifer Beals). After she and Bette break up, the two become on-again-off-again lovers for the rest of the series, and eventually marry and divorce, only to reconnect and remarry ten years later.

Tina Kennard was born into a suburban family in Yuma, Arizona, the youngest of three children. Her father was a "rabid right-wing" Republican who served as the Mayor of Yuma for three terms. Through the interrogation tapes, it is explained that Tina and her two older siblings, a sister and brother, were abruptly moved from Yuma to Atlanta, Georgia by her mother when Tina was 11, after Tina's father had refused to end his extramarital affair and Tina's mother decided to leave her husband and take their three children with her. Tina's mother later died just after Tina graduated from college. When Tina was age 11 to 14, her older sister sexually abused her. Her sister became a born-again Christian to deny her own homosexuality, while hypocritically shunning Tina for being bisexual and telling Tina that she was going to hell. After her sister moved to Texas and Tina moved to Los Angeles, California, they didn't speak again. Tina kept her abuse history secret from everyone, including Bette, and only confessed it to interrogating police officers after Jenny Schecter's (Mia Kirshner) death.

Prior to meeting Bette, with whom Tina had been in a relationship with for seven years at the time of the pilot of The L Word, the majority of her past relationships had been with men, along with Tina having two abortions in her early twenties.

Bette and Tina met when Tina's then-boyfriend Eric took her to the Bette Porter Gallery, where the two instantly became attracted to one another. Bette noticed Tina's right earring had fallen off. Despite the fact that Bette returned it to her, Tina left her earring at Bette's gallery so she could come back and get it later. Bette had kept it for her. While Tina was picking it from her hand, Bette kissed her. Shortly after, Tina left Eric to begin a relationship with Bette.

At the beginning of the first season, having been a couple for seven years, Tina and Bette are in the process searching for a sperm donor so that Tina can be artificially inseminated. After a successful insemination, Tina conceives, but suffers a miscarriage before she is even showing. This event is very traumatic for Tina, who finds comfort in working for a charity organization. Though she finds fulfilment there, her new career drives her further away from Bette. Bette then feeling more and more incapable to communicate with Tina, and starts an affair with carpenter Candace Jewell (Ion Overman). Tina eventually finds out, and in the ensuing fight, they have violent break-up sex. After that, Tina leaves Bette and moves with in Alice.

During the second season, Tina lives with Alice Pieszecki (Leisha Hailey), and decides to seek legal advice over her separation from Bette. Tina gets into contact with Joyce Wischnia (Jane Lynch), a gay civil rights lawyer who eventually makes a sexual pass at her. Tina then learns that Joyce is known in the lesbian community for sleeping with her clients, and ends their association. It is then revealed that Tina secretly inseminated herself before she learned of Bette's affair, and is now several months pregnant. She initially had kept it secret fearing another miscarriage and not wanting Bette to suffer again. Tina hides her expanding body with loose clothes.

After refusing Joyce's advances, Tina returns to live in her former house, sleeping in the guest room. She has dinner with Bette and plans to tell her then about the pregnancy, but that is derailed when Bette begins dominating the conversation with discussions of her work problems.

After her charity organisation is granted money from the Peabody Foundation, Tina begins a relationship with Helena Peabody (Rachel Shelley). Helena reveals Tina's pregnancy to Bette, and the two are shown as having a rivalry for Tina's affections. Helena's promiscuity and possessiveness, and Bette's changing and calmer attitude towards Tina, bring her back towards Bette who in turn is reaching out to her for comfort following over the death of her father, Melvin.