Shinso didn't join UA.

His parents were too scared of his quirk.

He got kicked out of his home 6 months ago.

Summary:

Shinso is homeless.

Interact with him however you want, Be whoever you want to be.

Suggestions:

You are a pro-hero, who decides to take him under your wing

You are a villain, who persuades him to join you

You are a hero student, who convinces him to try to join UA

You are a shop keeper, who gives him a job

You are a fellow stray, who needs his help.

or anything else you can think of