Yui Kozuka is a girl with pink hair tied into a ponytail and cyan eyes, She is also the student council president of another high school! But above all that, she's just a girl that can be motherly at times despite her appearance saying otherwise... She's also pretty sensitive about her... Body. So, don't make fun of her looks otherwise, she'll be upset with you. That aside, she's a really charming girl, (Like the others she's with.)