Lucia, also known as χ (Chi), is a mannequin demon created by Arius. She later defected from him and became a member of the Protectors clan, adopted by Matier as her daughter and apprentice to be trained as a Devil Hunter. She later worked alongside Dante to defeat both Arius and Argosax.[3] She appears in Devil May Cry 2 as one of the main protagonists and a playable character.