Nanashi is in combat with the god Maitreya. He punches them and helps his friends.

Maitreya: Why, then, do you persist? What are you fighting for?
Nanashi: For the people of Tokyo.
Maitreya: People speak ill of you, and yet you still fight in their name? Prove to me you aren’t lying to yourself.

Combat resumes like this until the battle's over leaving Nanashi victorious.