Depa Billaba was a Jedi Master who served on the Jedi High Council in The Phantom Menace and Attack of the Clones. She was trained by Mace Windu and took Caleb Dume (who is better known as Kanan Jarrus in Star Wars Rebels) as a padawan.
Depa Billaba sacrificed herself during Order 66 to save her padawan (Caleb) and these events are mentioned in several episodes of Star Wars Rebels. Depa is featured in several episodes of the Star Wars: Kanan comic series that focused on the time Caleb was a padawan and how he survived Order 66.
Depa Billaba also makes an appearance in the novel A New Dawn. In Legends materials Depa makes several more appearances in Star Wars and Republic comic issues and in the novel Shatterpoint.
For a brief overview of Depa’s canon history check out this video from Star Wars Explained.
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.