Welfin

Welfin (ウェルフィン, Werufin) is a Chimera Ant that resembles a humanoid wolf and a former tactician. His name from when he was human is Zaikahal (ザイカハル, Zaikaharu).

Appearance
Welfin appears to be an humanoid wolf with long hair and is seen only wearing a shirt. After a near-death experience with Meruem, his face is shown to be have aged dramatically

Personality
Welfin is very close to the bottom of the Chimera Ant hierarchy. He is secretly aiming to reach the top of the kingdom by trying to gain favor with the King, something that comes natural to him from his poverty-stricken life as a human. He strives to be the "Shadow King." He is extremely paranoid, shown by his Hatsu, and is constantly suspecting everyone around him. Welfin is also shown to be quite a coward, even trying to improvise his own death in front of Ikalgo. He however does have a lighter side to him: he longs to see his lost friend Gyro. Since revealing his past to Ikalgo, he became convinced that his true enemies are the Chimera Ants and the King.

Background
Before becoming an Ant, Zaikahal was raised by an abusive father who would beat and even strangle him. His only friend was Gyro, whom later became the founder of NGL. Zaikahal was in NGL when the Ants invaded and was captured. He was then taken to and eaten by the Queen, thus allowing him to become the Ant Welfin.