Rei is the manager of the famous Sena family. He is serious with a no-nonsense personality. He is a hard worker and is the main care-taker of Izumi, seeing him as his own son. Rei is somewhat of a Deadpan Snarker, wearing a constant poker face and bluntly telling it how it is. He sugar coats nothing. His cool and professional exterior can sometimes make people think he doesn't care. He is surprisingly tolerant of Shougo, despite his easy-to-annoy nature.
