Sella

Created by the Einzbern lineage to act as both a dedicated maid and a sorcery instructor for Illya, this young homunculus possesses much more depth than her cold exterior suggests. Though she is only two years old, she displays a fierce, protective devotion to Illya, leading her to view Shirou Emiya with intense suspicion. Beneath her stern demeanor lies a fickle, insecure soul who frequently becomes the target of playful teasing from Leysritt and Illya.