Naomasa Tsukauchi/Relationships

All Might
Naomasa is a good friend of All Might and one of the few people that knows about the hero's condition. He also takes care of All Might's file work.

All Might thinks he is the best cop there is, which shows how much faith he has in him.

Naomasa and All Might first met while All Might went under the guise of Toshinori (in base form) was posing as All Might's contact, in recommendation of Naomasa's chief. While they were having a conversation in a café, Toshinori constantly made excuses and run to perform quick deeds as All Might. When Toshinori accidentally returns with the uniform still visible (revealing his dual identity as All Might), Naomasa calls him out on not filing reports on all of his heroic activities (as customary of a Professional Hero). Taking pity on the number 1 Hero, Naomasa offered to file the reports himself, letting All Might act without any worries apart from telling Naomasa what he was doing. They have since remained good friends with Naomasa being one of the few individuals that Toshinori fully trusts and can confide with.

Professionally the two also have a special relationship with Naomasa revealing information directly to All-Might on matters such as All for One and Nomu.