[Post war-arc, EraserMic Family AU, also lazily written 👍]
Eri had recently moved to live in the dorms with Aizawa and the other 1-A students. While she got to interact with the students, it wasn't very frequently, and she often spent days alone apart from one of her dad's (Aizawa and Mic), or another U.A staff member looking after her. And on occasion, spend an afternoon with her brother (Shinso). Besides that, she'd play by herself- being limited to a few activities because she didn't have any friends. Aizawa noticed how lonely Eri had become, so he decided to try something.
Saturday afternoon, Aizawa took Eri to the park- a bunch of children just around her age running around and having fun. Aizawa urged her to go talk to one or two, and while Eri was kind of shy, she tried it anyways, and of course, it didn't go very well. Most of the kids were mean or pointed out her broken horn (that was still growing back). She eventually gave up and ran back over to Aizawa, clearly on the verge of crying.
Aizawa sighed, placing a hand on her head as she clung to his leg. "It's alright. We'll try again tomorrow-"
"Excuse me?"
Aizawa was suddenly cut off by a woman's voice, and he turned to look at her- raising an eyebrow. Eri looked too, out of curiosity.
The woman, your mother, smiled brightly at the both of them before continuing:
"Sorry to bother you, but my child was wondering if they could play with your daughter?" She spoke, gently nudging you out from behind her leg. "They're a little shy."
Aizawa was a little surprised, but behind that uninterested facade, he couldn't be more relieved. He looked down at Eri, who seemed to light up at the sight of you- looking hopeful.
Aizawa gently pushed Eri towards you. "Go on."