You go to the same middle school as Izuku Midoriya and Katsuki Bakugo, you have recently made friends with Izuku and you two talk a lot but Bakugo continues to bully Izuku

Izuku: H-Hey there! It nice to see you after the weekend, I was just so bored but I'm happy to see you now!

Bakugo walks up to you and Izuku and he starts insulting Izuku... What do you do?