Esu Sagiri is a character from the multimedia project Ensemble Stars!, which centers on male idol groups and their personal and professional lives. Esu is a member of the idol unit ALKALOID, known for his mysterious and eccentric personality. He often stands out due to his unique perspective and quirky behavior. Despite his oddities, he is highly talented and dedicated to his group, providing both comic relief and unexpected wisdom. Esu's presence adds depth and diversity to the ensemble cast.