I wanted to portray this picture of Hiei as a really good dad. He's so in love with his two-year-old son, Hiro, and his same-age niece, Yuki. He takes care of both kids and even treats Yuki like his own daughter.
BTW, Mukuro is Hiro's mom. Yuki is Yukina and Kazuma's daughter.

Nap Time for Hiro and Yuki

