Bidou Granmanie, alternately spelled Granmarnier or Granmarie, is the son of Sweden's Ambassador to Japan and possesses one-quarter Japanese heritage, with one younger brother. Standing 182 cm tall and blood type B, his strikingly androgynous features allow him to convincingly wear women's clothing, favoring styles popular among older women.

He declares himself the "Beauty of the World," embracing extreme narcissism and a playboy lifestyle where he dates multiple girls simultaneously. He avoids committed relationships, convinced the world cannot endure him belonging to one person. Despite his confidence, he is remarkably accident-prone, frequently sustaining injuries more than any group member, and claims a history of being "cursed by women."

He attends St. President Academy as part of its Leisure Club. Gifted in sports, particularly those favored by women, and multilingual, he contrasts these talents with exceptionally poor driving skills that render car rides with him hazardous.