Yasaburō Shimogamo

Protagonist. Third son of the Shimogamo family.

He lives freely, guided by his father's words, "Interesting things are good things!" Among his siblings, he has inherited the most of his father's rare transformation abilities, allowing him to transform into various things, from a high school girl to a daruma doll. However, he was unaware for a long time that his disguise would fall apart in front of Kaisei. He usually disguises himself as a male university student. He also believes, "What's wrong with using this power, granted only to us, to enjoy life?"

He once conspired with his first love, Benten, to cause the "Demon King Cedar Incident," but he feels indebted to Professor Akadama for that, and since then, he has been taking care of him in various ways. According to Professor Akadama and Yajirō, he was the most favored by their father among the four brothers.