Sella (セラ, Sera?) is a homunculus created by the Einzbern family to serve as a maid and to teach Ilyasviel sorcery. Despite her appearance, she is only about two years old.
Role
Usually, her long silky blonde hair is hidden in the hood she wears. She is rather fickle and insecure (especially regarding her body), and is very suspicious of Emiya Shirou. She has a driver's license and is afraid of ghosts. Her attitude is harsh for what she is often teased, but she loves and protects Ilyasviel no matter what happens. She keeps a distance from humans and prefers to take care of the flora and fauna of the castle. She was made on the basis of the same shape as Leysritt, but she was made as a pure homunculus two years ago with normal alchemy. She is different from Ilyasviel and Leysritt as she is not a miracle of the Einzbern family, but a homunculus with perfect efficiency. The ability of her body is inferior to others, but she makes up for it with superb magic circuits. As a magic teacher she is superior, but as since she is a fragile homunculus ,she is unsuitable for battle.