Crazy Jane

Crazy Jane is a fictional character created by Grant Morrison and Richard Case for their work on the Vertigo Comics version of "Doom Patrol". She first appears in "Doom Patrol" Volume 2 #19 (February 1989). According to the afterword in the first trade paperback collection of Morrison's "Doom Patrol", she is based on Truddi Chase, whose autobiography, "When Rabbit Howls", Morrison was reading while creating the series.
Jane makes her first live adaptation and is part of the main cast of the "Doom Patrol" television series on DC Universe and HBO Max, played by Diane Guerrero.
Fictional character biography.
Jane Morris is the current dominant alternate personality, or "host", of Kay Challis's "system" (used to refer to every alter someone has as a collective). Kay Challis, as a result of repeated childhood trauma, developed dissociative identity disorder. Later in life, while being exposed to the alien Dominators' "gene bomb", each of her alternate personalities, or alters (which, to date, is numbered at 64), has a different super-power.
Beginning at only five years old, Kay Challis was continuously abused by her father. The first time this happened, she was putting a jigsaw puzzle together; this would become an important symbol in her future. As the abuse continues, Kay withdraws and goes dormant, retreating to the unconscious brain. Her role as host is then taken over by an alter with the name "Miranda". One Easter Sunday while at church, Miranda is raped, which triggers several flashbacks to her former abuse. This causes the dormancy of Miranda and a massive amount of alters to be split off. She is committed to a mental institution soon after. During that time, an alien species called Dominators invade Earth and activate a device which they call their "gene bomb". When the gene-bomb goes off, Jane and all of her personalities are affected; each personality gains a different power (e.g., Black Annis has retractable claws, Flit can teleport, etc.).
The super-hero Cliff Steele, or Robotman, suffered several losses due to this bomb. Killing many of his Doom Patrol teammates, he was struggling emotionally. While he's staying in the same institution as Jane, Dr. Will Magnus, creator of the group "the Metalmen", asks Cliff to look after her, which leads to Jane's becoming a member of the Doom Patrol.
Near the end of the Grant Morrison run of "Doom Patrol", Jane makes a pilgrimage back to her childhood home, facing her own traumas and overcoming them. This brings peace to her inner turmoil, causing her and her alters to come to an understanding and live in co-operation.
Upon returning to the Doom Patrol, Jane is attacked by The Candlemaker and thrown into another dimension, which is similar to the real world, where she is diagnosed with schizophrenia and treated with shock therapy. Cliff eventually rescues Jane from the other dimension and they relocate to Danny the World, formerly Danny the Street. In Rachel Pollack's run, it is revealed that Jane's alters still exist, which causes many arguments between the two. Cliff decides to leave her with Danny and returns to Earth. 
Jane makes a cameo appearance in "Teen Titans #36", where she is seen on Danny the World through a portal in Dayton Manor in Prague. She returns in "Doom Patrol" #7, written by Keith Giffen, on Oolong Island, asking for Cliff and carrying with her the remains of Danny the Street. Danny has now been reduced to a single brick, making them Danny the Brick. Jane says "If you build it, he will come", although she does not explain further.
Jane then travels around the universe along with Danny the Brick. A man named "D" then uses Danny the Brick to kill a god and causes another alter to split, or "break off". This alter starts a cult and plans to spread Crazy Jane's alters among the 63 cult members and then kill the cultists. She is stopped by the Doom Patrol, who then return Jane to the front, in order to be the host.
Jane now accepts her mental illness, no longer seeking to cure it but to cope with it and healthily coexist with her alters. Robotman also helps and accepts her disorder.
Alters.
Crazy Jane's alters are organized in a mental subway grid called "the Underground", their headspace/innerworld. Each alter has their own 'station', which appears to serve as home when they are not in control. In the lower section of the Underground is a well where the alters can go to destroy themselves. This is where Miranda was "killed". This well houses Daddy, an alter who resembles their father, in the deepest, most protected part of the Underground. The alters consist of:
There are still other 13 alters in Jane who haven't yet been properly identified. They include a red-headed girl with a beauty mark in a red dress; someone in gladiator gear; a red-headed school girl; a boy with short blonde hair; a person with an orange, odd-shaped head; and a woman whose face is shadowed over.
In other media.
Crazy Jane appears in the DC Universe live-action "Titans" spin-off series "Doom Patrol" portrayed by Diane Guerrero (who also portrays Driver 8 and Karen, alongside whichever alter is on the surface, or in the front at any given point) and her younger version portrayed by Skye Roberts, while Black Annis is portrayed by Helen Abell, Hammerhead is portrayed by Stephanie Czajkowski, Lucy Fugue is portrayed by Tara Lee, Penny Farthing is portrayed by Anna Lore, Pretty Polly is portrayed by Hannah Alline, Silver Tongue is portrayed by Chelsea Alana Rivera, The Secretary is portrayed by Jackie Goldston, Driller Bill is portrayed by Shay Mack, The Weird Sisters are portrayed by Monica Louwerens, and Miranda is portrayed by Samantha Marie Ware. Crazy Jane seems to be the "designated driver" personality out of the 64 alternate personalities, who prefers if she stays 'at the wheel' while they keep to themselves. It's also mentioned that three of the alters are "gluten free" and that 12 are allergic to peanuts.
The "Doom Patrol" version of Crazy Jane appears in the fifth part of the Arrowverse crossover "Crisis on Infinite Earths". She appears through archive footage of a deleted scene from a season one episode.