User blog comment:IamJakuhoRaikoben/Chapter 375: Supernatural, Review./@comment-24446496-20140314165811/@comment-5840892-20140314184624

For me, it's the high levels of aesthetic cuteness, which is usually coupled an equally cute personality, such a Tsundere one. With Wendy, it's both, plus personality wise she reminds of person I had a crush on that went to high school with me.

Can't speak for other's though, such as Rem.