Maul is a sith assasin that wanted revenge on Obi Wan after losing half of his body to Obi Wan Kenobi.
Canon Story Edit
When Maul was a child and lived with his mother, Mother Talzan. After a sith lord named Darth Sidious, Sidius took the child and trained him into a dark side user. Originally, Sidious was going to make Maul into a sith assassin but after Darth Plagueis, Darth Sidious's master was killed by Sidious. Palpantine made Maul is apprentice.During the Battle on Naboo, he fought Obi Wan Kenobi and Qui Gon Jinn, he would later kill Jinn but ending up losing half of his limb the jedi padawan.
Assuming to be dead, Maul went into hiding and using his pain to create spider legs before he was found by his brother Savage Opress after 15 years. During the time Maul finally came back, he killed villagers and fought Obi-Wan again but the day came when Darth Sidious killed Savage and kidnapped Maul.
He used him to capture and kill Mother Talzan but this didn't last long as Clan Vizla freed Maul and gave Maul The Dark Saber. He would go on to capture Dooku and Grevious but free then after Jedi Obi-Wan, Mace Windu and Aayla Secura found Maul and hijacked him. After running from The Jedi, Maul would go on to see his mother be killed by Grevious.
After in a run in with Ahsoka he escapes and hides into the planet of Malachor. When Ezra Bridger, Caleb "Kanon Jarrus" Dume, and Ahsoka find Maul. He sides with the 3 jedi and kill The Seventh Sister, The Fifth Brother, And The Eighth Brother. He blinds Kanan after Ezra goes up to the malachor temple. After losing to Kanan he fly away on Darth Vader's Tie Advance.