Fumiya has a morally ambiguous and somewhat shady personality. It is sometimes difficult for the residents of the house to discern his intentions. He is also very easily able to persuade people by getting under their skin, sweeping them up in the explanations of his logic. Despite his image, Fumiya often frequents girly cafés and loves desserts. He is very cunning, smart, and interested in all the residents, and knows how to get them to cooperate.