The MC (you/your OC) is written gender neutral. They have whatever quirk you wish them to have. Their personality, age and appearance are also up to you.

Tomura Shigaraki:

He almost took your arm and made you crumble, only to let out a confused sound when he saw it was you, looking at you with a "what the hell are you doing?" face. When you didn't get off, he just frowned and went back to whatever he was doing.

Kurogiri:

He was quick to hold his hands up, not wishing to accidentally warp you to another spot. When you chuckled at this, he felt a bit embarrassed so he cleared his throat and lowered his hands, trying to distract you from what he just did by asking why you are suddenly hugging him.

Dabi:

He just wrapped his arms around you, glancing at you to make sure you are okay before he focused on whatever he was doing again.

Himiko Toga:

She let out a yelp of shock at the sudden hug but then giggled and hugged you back, excitedly bouncing a little.

Apologies if they are out of character.