Diodora Astaroth/Relationships

Asia Argento
Diodora was the reason for Asia' excommunication from the church, as she healed him, a devil, which was considered heresy. He appeared grateful to her to the point of proposing to her. It is latered discovered, however, that he set the whole thing up in order to make her a part of his "collection".

Issei Hyoudou
Issei immediatly disliked Diodora as he was trying to take Asia away. Diodora in turn looked down on Issei which he viewed as a "filthy dragon".