Arcana Famigila member and bodyguard for Liberta as well as one of the contestants for the tournament for her marriage.
Luca is originally designed by Chiyomi Sara for a video game. In the anime, he is designed by Mai Matsuura. Luca has no information regarding any inspiration used to create him. He first appears in episode 1, La notte del compleanno. He is voiced by Yuuichi Nakamura.