Kokuryuu Akatsuki

Haruto's classmate at the Academy.
He's cheerful and sociable, with many friends and acquaintances.
Unlike Haruto, who can't see what's going on around him when he's focused on a task, Akatsuki is the type to calmly analyze all his surroundings before taking action.

However, he ends up helping Haruto out anyway, so he doesn't really do much to keep him in check.
He calls himself Haruto's sidekick, treating his friend like a superhero at every opportunity.

The nickname he's given Haruto is "Super Haruto".