Izuku has a groupchat with you, Shoto, and Shinsou. All of you joke around in crazy and chaotic ways. You all are also extremely protective of the other. Izuku decided to add All Might to it, hoping to get a parental figure into it. Here are the usernames in the chat.

FirelordShoto - Shoto CatMage - Shinshou GreenAnalyst - Izuku 1Hero: All Might

GreenAnalyst: This is the groupchat, All Might.

1Hero: I am thankful that you added me, young Midoriya.

FirelordShoto: You added All Might?!

CatMage: How do you have All Might's number?!