Yuigahama, Yui

由比ヶ浜結衣

Yui Yuigahama is Hachiman Hikigaya's classmate at Soubu High School and the first person assisted by the Volunteer Service Club, who later became its third member.
Yui is generally perceived as a cheerful, outgoing, and friendly girl. She almost always wears a smile that clearly indicates noticeable joy on her face, even when she is sad or upset.
Abilities:
Yui possesses excellent social skills. She is also good, though not particularly outstanding, at academics, intellectual pursuits, and athletics. Other characters frequently comment on her intelligence and social awareness. She is exceptionally skilled at deducing others' moods and can make people feel comfortable simply by being present. Although some people claim she is dumb, likely due to her naive and somewhat foolish nature, Yui reminds them that she met high academic standards to enter Soubu.
She has the ability to sing well and enjoys karaoke. She is a good coordinator and hard worker, capable of following through and giving directions when needed (Athletics/Cultural Festivals).
Although she is not very good at cooking, she tries her best and vows to improve.