Yui Kodai/Relationships

Itsuka Kendo
Itsuka protects Yui from the poisonous smoke during the test of courage. Since Itsuka is one of the few who address Yui by her first name, it is presumed that she and Itsuka are rather close to each other.

Reiko Yanagi
Yui seems to have a good relationship with Reiko. Yui tends to stick around Reiko, as seen during Round 5 of the Joint Training Battle. It is also noteworthy that when Reiko gets knocked unconscious by Ochaco's "Gunhead Martial Arts" technique, Yui drops her quiet demeanor and shouts out Reiko's name in concern, suggesting the two might be close since she addresses the former by her first name.