Main Characters

Bojack Horseman
A self-loathing cynical alcoholic horse currently in his 50s, whose acting career peaked when he starred in a successful 1990s family sitcom called Horsin' Around.

Princess Carolyn
A pink Persian cat who is BoJack's agent in the first three seasons and former on-and-off girlfriend.

Diane Nguyen
A human ghostwriter, a well-schooled, misunderstood intellectual, and a Vietnamese-American third-wave feminist from Boston.

Mr. Peanutbutter
An energetic, optimistic and cheerful yellow Labrador Retriever who is BoJack's former sitcom rival.

Todd Chavez
An unemployed, silly but vastly talented 24-year-old human slacker who ended up at BoJack's house for a party five years before the beginning of the series and never left.
Notable Side Characters

Beatrice Horseman
A horse who was BoJack's neglectful, verbally abusive mother. Heiress to the Sugarman sugar cube fortune, she primarily appears in flashbacks of BoJack's childhood and young adult life.

Butterscotch Horseman
A horse who was BoJack's physically and verbally abusive father. He appears in flashbacks to BoJack's childhood.

Herb Kazzaz
Was BoJack's human former comedy partner, who created and wrote Horsin' Around where he also provided the voice of Mr. Libertore who runs the law firm where the Horse works as an attorney.

Sarah Lynn
Was a human actress who played the Horse's precocious adoptive youngest daughter Sabrina on Horsin' Around starting when she was only three years old, and who looked up to BoJack off-screen as a father figure.

Pinky Penguin
Is an Emperor penguin and book editor who works at Penguin Publishing. He was depending on BoJack's book to save his job and the entire company.

Wanda Pierce
Is a burrowing owl who is BoJack's girlfriend in season 2. She meets BoJack after reviving from a thirty-year coma.

Charlotte Carson
Is a deer who was Herb Kazzaz's old girlfriend with whom BoJack was once in love.

Crackerjack Sugarman
Beatrice Horseman's older brother, BoJack's uncle, and the eldest son of Joseph and Honey Sugarman, who died in World War II when Beatrice was very young.

Crackerjack Sugarman
Was Beatrice's father and BoJack's maternal grandfather, the owner of the Sugarman Sugar corporation.

Honey Sugarman
Was Beatrice's mother and BoJack's maternal grandmother. She was a housewife and exceptional singer, but suffered from post-traumatic stress disorder after her son, Crackerjack Sugarman.