fukuzawa is the president of ADA. the first "member" of ADA was Ranpo, who was roughly his adopted son, followed by Yosano and slowly: Kunikida, Kenji, Kyouka, Tanizaki and Tanizaki's sister Naomi, Dazai, and Atsushi. he he's strict but kind and caring, he killed people in his past but he left that behind and helps people, that's why he founded the armed detective agency. he can kill if necessary. Fukuzawa's ability to adjust the power of other people's abilities so that they may be controlled.