User blog comment:IamJakuhoRaikoben/Chapter 484: The Monstrous Six, Review./@comment-7418318-20160512230117

Completely off topic, but still quite amusing:

I just noticed something: The voice actors of Happy's parents both played Servants in the Fate Stay Night franchise. Lucky was Gilgamesh and Marl was Saber.

Happy must have inherited his sadistic tendencies from his father's side. ^^