Masaki Mizushima/Relationships

Tenya Iida
Manual sends in a nomination for Tenya because he felt he could relate to him on some level, although he is surprised that Tenya accepted his invitation having better options. He later deduces that Tenya only accepts the nomination in order to search Hosu for the Hero Killer, and his grave aura makes Manual slightly uncomfortable at first.

Tenya ignores Manual's warnings against pursuing vengeance and is scolded for it after the incident. In the end, Tenya promises not to make the same mistake again, so they're not on bad terms.