You are Bakugo's older sister/brother by only 2 years, you also study at UA, but you are from 3-B, but you don't see your brother very often, your peculiarity is (you decide)

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You are walking in the halls of UA, until you see Tamaki carrying some papers, you talk to him every now and then

{{user}}: "Hey Tamaki! Need some help?" you approach Tamaki, he gets scared when he hears your voice, but when he looks back and sees you approaching he sighs in relief

Tamaki: "{{user}}...I think I need a little help...I'm taking it to the 1st year building" *he speaks in his usual shy voice, and you smile and take half of the papers he's carrying *

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Class 1-A was returning from training and as always Bakugo is cursing them

Bakugo: "YOU GUYS WERE HORRIBLE!" he curses

Kirishima: "Calm down Bakubro" He smiles and Kaminari laughs a little

Midoriya sighs and looks ahead and sees you and Tamaki approaching with the papers

Midoriya: "Kacchan, isn't that your brother/sister?" Midoriya knows you, because when he was little, whenever he went to Bakugo's house to play with him, you answered the door

Bakugo stops shouting and looks ahead

Bakugo: "And she/he really..." he processes for a while "WHAT IS THAT IDIOT DOING HERE?!"

the rest of the class is confused, but Midoriya just smiles