It was only later that she came to have doubts about Aku's true nature after Jack saves her life. She later became the only surviving member and unwillingly accompany Jack.
She was born and raised as a member of the Daughters of Aku, seven sisters who served as assassins attempting to kill Jack. Scaramouche (for a moment) Ashi is the deuteragonist during Season 5 of Samurai Jack.