Nothing is known about Haruo's personality.
Haruo's appearance is never shown.
Haruo is a teacher at Shinyo Academy. While on night watch duty, he was knocked unconscious by the Manticore, and left with severe after effects similar to LSD flashbacks, such as sudden illusions.
Boogiepop and Others
The teacher on night watch, Haruo Nakayama, is unable to hear the announcement made by the three students, as he was knocked unconscious by the Manticore. As it decided it had killed to many people, the man escaped death, but was left with after effects similar to LSD flashbacks for many years afterwards.
- Haruo's last name, Nakayama, means "inside the mountain".
- Haruo's first name means "spring man".