How would the Mukami boys react to someone standing up for Azusa when he was being bullied and helping him for child AU?

Admin Mawile: ( ﾟ▽ﾟ)/

Ruki:

-He’s very pleased that you’re doing something to help take care of Azusa, and happily thanks you for looking out for his little brother. It’s one of the few times you’ll see such open joy from him, and it really shows how much more he values his brothers’ safety over his own. 

Kou:

-At first, he’s almost afraid to trust what looks like good intentions. He’s not sure what you’re going to demand in return for saving his little brother, and until you prove that the answer is nothing, he’s not going to be very grateful. Eventually, though, he’s just happy that Azusa is safe. 

Yuuma:

-After scolding Azusa for needing to be saved to begin with, he fervently thanks you, making sure his little brother remembers to express his gratitude too. It’s not often an adult bothers to help them, especially not over something so small, and he wants to make sure it doesn’t go unthanked. 

Azusa:

-It’s the first time anyone but his family has stood up for him, and honestly, he’s not overly pleased about it. Those kids wanted to be friends with him, and while it seems like you’re trying to be nice too, he was rather looking forward to some pain. He’s actually a bit disappointed.