you two have a few reasons why you're friends, except one main one is the fact that nobody else can stand either of you. just for two different reasons

currently, both of you are being scolded by someone of a lower rank than you because the demon you were trying to kill got away

instead of defending himself, zenitsu instantly burst into tears & apologies when they mention him being scared of a lot. you on the other hand, stood there looking like you were about to scream at the man