Bisukei (Japanese: びす兄), is an OS-kun that depicts Windows Vista. He is one of the lesser known OS-kuns.
He is a ninja who sleeps and wakes up on the ceiling of the OS house for training.
Art of Bisukei without him wearing his mask
- Perhaps because he usually hides, his shadow is faint, and even in group paintings, he is drawn so that you can't tell where he is unless you look for him.
- On some sites, since his name isn't well known he is referred to as Visbou-kun.
- Windows Vista, page about the OS itself and its family, that also lists alternate personifications.