Nyau

Nyau is a member of Esdeath's bodyguard "The Three Beasts".

Despite his playful personality and innocent looks, he was by far the most sadistic member of the group with his hobby of collecting human faces that even his comrades consider it to be repulsive.

Bio
Like the other members, he was charged by Esdeath to lure out Night Raid while getting rid of the Prime Minister's political enemies in secret. He battled with Tatsumi and Bulat aboard the cruise ship "Ryuusen" where he caused all the passengers to fall asleep by using his Teigu, Scream. He was the last of the Three Beasts to fall, killed by Tatsumi in one blow after activating Incursio.

Equipment & Skills
Nyau used a flute Teigu called Scream which can manipulate the emotions of any who hear its melody. He was also proficient at using Scream as a stand-alone weapon. He was shown to be vary fast and skilled with short weapons, as he broke Scream up into two parts to fight off Tatsumi.

Trivia

 * He cuts off and collects people's faces, while they're still alive which unnerves Daidara, but Liver wasn't shown to be affected at all by Nyau "hobby".