Thief Arthur is the main character from Square Enix’s Million Arthur series. She made her fighting game debut in SNK Heroines: Tag Team Frenzy (2018). Her storyline in SNK Heroines is as follows: "One day, she snuck into Camelot to steal some treasure, but ended up pulling out an Excalibur and being chosen as one of the million candidates to be the new king. While she doesn't act very kingly, she's a chivalrous outlaw by nature, so she always ends up helping those in need."