Bastila Shan is the first woman in 365 Days of Star Wars who is a purely Legends character (meaning her character has not appeared in any official canon Star Wars productions since the 2014 decision to classify all previously named Expanded Universe books/comics/video games “Legends”. Here is the official announcement of this change if you’re not familiar with this topic.
Bastila Shan’s first appearance was in the roleplaying video game Star Wars: Knights of the Old Republic (widely referred to as KotOR) that debuted in 2003. She was also in the KotOR sequel Star Wars: Knights of the Old Republic II: The Sith Lords that came out in 2004.
These video games took place way before the events of A New Hope and its prequels – about 4,000 years before to be exact(ish). Shan was a Jedi who had the power of battle meditation which assisted her allies and hindered her foes.
For a quick biography of Bastila Shan you can watch The Legend of Bastila Shan from Star Wars Explained.
There’s also a slightly longer account of Bastila Shan’s adventures in Bastila Shan: A Star Wars Story from The Scoundrel’s Cantina.
Bastila Shan also appeared in “Shadows and Light” a part of Star Wars Tales 23 comic from Dark Horse Comics and the adventure “The Betrayal of Darth Revan” which was part of the Star Wars Roleplaying Game Saga Edition by Wizards of the Coast.
If you’re looking for a book with Bastila Shan in it you can seek out The Old Republic: Revan which is one of the books based on the MMORPG (massively multiplayer online role-playing game) Star Wars: The Old Republic.
For a full written account of the life of Bastila Shan see her Wookieepedia page.
Check out the entire list of women in 365 Days of Star Wars Women in the Women in Star Wars Index. It includes highlights from each post plus notes which posts include new 365 interviews with actresses, writers, artists, and more.