Menthuthuyoupi

Menthuthuyoupi (モントゥトゥユピー, Montutuyupiī), nicknamed Youpi, is one of the Chimera Ant King's three Royal Guards.

Appearance
Menthuthuyoupi is the least humanoid of the King's Royal Guards. He has irregularly shaped ears, legs, and razor sharp teeth. Youpi is the largest of the Royal Guards and scarcely clothed.

Personality
Menthuthuyoupi is the most straightforward of the Royal Guards and possesses a strength that comes from his lack of an ego. He is a Chimera Ant without an iota of human genetic material within him, caring less about his identity as an individual. Youpi is quick to cease unnecessary thought, focus on prioritized goals, and act upon his instincts—allowing the ant to be completely selfless and devoted to the King as such. However, his simplicity is both a boon and burden. Menthuthuyoupi's belligerent, vehement, capricious, and irascible nature make him a fine, yet, variable soldier.

Background
Little is known about Youpi's past, but in fact he is the only non-human hybrid among Chimera Ants as he inherited genetic material from both his Chimera Ant mother and a Magical Beast.

Chimera Ant arc
Menthuthuyoupi is the last of the Royal Guards to be born shortly prior to the King's breach and, as all, Youpi is also personally named by the Queen. Most of the time, he stays quite and still along with the Royal Guards for the King's orders, up until the Chimera Ant Extermination Team charges into the palace of East Gorteau.

He is engaged in battle against Knuckle and Shoot, Shoot taking the lead against him. Knucle, hidden within Meleoron's ability, wait for the right moment to strike him and activate his ability. Shoot, about to be killed by Youpi, is saved by Knuckle who succesfully land a blow on him and activates his nen ability. Youpi takes the advantage once again very easily but Morel arrives and uses his last ability (due to Pouf stealing his smoke pipe) to create several Knuckle's smoke clones.

Enraged by their tactis, he activates his Rage Blast and along with that, a deep understanding of his own Nen abilities throughout their battle. However, Youpi simultaneously comes to understand his own identity; thus allowing the hunters to live because of this.

Youpi, along with Shaiapouf, whitnesses the King's battle against Netero and the moments whent the Miniature Rose explodes. He gives the King part of his life so he could survive that attack. The King gives orders to Youpi and Pouf, and he returns to the Palace where he encounters Welfin and when he starts suspecting Welfin's intentions and behavior, he threatens into killing him. However, Youpi dies in a weakened state, having been lethally poisoned after rescuing the King from the smoldering hypo-center left in the wake of Netero's sacrifice.

Powers and abilities
Moderate Intelligence: While not his specialty, Youpi is quite capable thinker, he figured how his Rage Blast works and how to control it.

Strength: Youpi is one of the physically strongest Royal guards.

Nen
Menthuthuyoupi is an Enhancer, Knuckle estimates the size of Youpi's aura to be at least 10 times greater than Morel's, or at least 700,000.

Trivia

 * Menthuthuyoupi's name, like all of the Royal Guards, comes from the Egyptian god Menthu and a character named Youpi from a French children's book series called Caroline et ses Amis.
 * He bears a striking resemblance to Gotoh, the villain of the manga Parasyte. His abilities are also strikingly similiar in method and capability.