Hanako-kun

The titular protagonist of Toilet Bound Hanako-kun is a ghost who haunts the toilet of a high school building

Background & history
Reveal true identity (spoilers) Hanako-kun's real identity is Amane Yugi, a young boy who died early due to an accident. Later on, the manga introduces his identical twin brother Tsukasa Yugi, who is also a ghost. Because of this reveal, the ISML website displays his true name, as well as some other character contests throughout the internet.