Class 1-A#
Momo Yaoyorozu#
They may not interact on a daily basis but Yosetsu has worked with Momo in real battle when the Vanguard attacks the Forest Training Camp. The pair were attacked by a powerful Nomu and Momo was injured, forcing Yosetsu to do everything he could to save her life, even protecting her with his own body[1]
After that incident, Yosetsu developed a small crush on Momo Yaoyorozu.[2]