Kyounai Yamino belongs to the fanganronpa called Danganronpa Dreamland.
All credits of the character goes to them exclusively. 
If you wish to find more about the fangame, here's their official social media accounts:

Twitter: https://x.com/dgrp_dreamland

Tistory: https://dreamland-dangan.tistory.com/

Character ported by Loginator on discord!