Hiei is a Yotsuba-type personality all grown up (for certain values of "grown up") - short attention span, high energy, good-hearted, enjoys everything.

Hiei is amazing.

kouji's Hiei is OP in her own right. She doesn't need a nerf (proof: even reverted she still kinda trumps the girls who hold affection for him)

Mithiwithi said:

Hiei is a Yotsuba-type personality all grown up (for certain values of "grown up") - short attention span, high energy, good-hearted, enjoys everything.

Sounds like prime waifu material.

Jarlath said:

Sounds like prime waifu material.

While it may sound attractive lets just say been there done that for the first and last time because there are hidden down sides that outweigh the upsides.