The various personalities or 'Alters' of Tara.
Alice is a "June Cleaver-esque" housewife, who has been around for the longest time, dating back to Tara's childhood. She is extremely domineering, believing herself to be the 'true' personality rather than Tara and wanting permanent control of the body. When Charmaine and Tara travel out of town to meet Mimi, it is instantaneously obvious that Alice was based on her.
Buck is a loud and profane troublemaker, characterized by Collette as "the aggressive protector type, a man's man". He explains his lack of a penis by claiming that it was blown off in the Vietnam War.
T is a fifteen-year-old girl. She smokes pot and is wild and flirty. She is provocative in her mannerisms and style of dress. She relates well with Kate, providing her with the morning-after pill and frequently attempting to take her on shopping sprees with Tara's credit cards.
Gimme first appeared at the end of episode six of season one, but its existence was foreshadowed on multiple occasions before, mostly by Alice. Gimme is not so much of a human than an anamalistic expression of pure id. It is very destructive, and makes awful screams. In the season three episode "Bryce Will Play" Gimme is killed by Bryce.
During the second season, two alters were introduced. They are:
She appears as a stereotypical 1970s feminist, and speaks with a New York accent. She is the most psychologically profound alter. In the season three episode "Bryce Will Play" Shoshana is killed by Bryce .
Chicken first appears in the second-to-last episode of season two and is a mental presentation of Tara's 5 year old self. In the season three episode "Chicken 'n' Corn" Alice tells Dr. Hattaras that Chicken is missing; Tara later tells him that Chicken has been killed by Bryce.
During the third season, a new alter is introduced: