Menthuthuyoupi

Menthuthuyoupi, usually shortened to Youpi, is one of the three Royal Guards of King Meruem and the last of them the Queen bore before the King's birth.

He is the least humanoid of the Guards, though his frame remains loosely human: heavy musculature, irregularly shaped ears and animal legs ending in clawed feet. He is the only one of the three with no human genetic material at all, born from a Chimera Ant parent crossed with a Magical Beast.

Youpi is the most straightforward of the Royal Guards, and much of his strength stems precisely from having no ego to protect. He carries no memories of his genetic components' past lives and firmly believes he did not exist until the Queen gave birth to him. He dismisses unnecessary thought instantly and acts on whatever the priority happens to be.

In raw power he ranks among the strongest figures in the series — Colt believed him capable of defeating Chairman Isaac Netero himself. Voiced by Fumihiko Tachiki.