He represents the "Pleasure" of Noah, and is one of the main antagonists of the D. Gray-man series. Tykki Mikk presents two different personalities, a "light" and a "dark" side as he says. In fact, if he seems a quite and gentle person when he is with his human friends, at the other side he shows a brutally bloodlust and a perverse sadism, especially when he kills Exorcists. He has a different rapport with the humans than the others disciples of the Noah's family, and is the only one that could feel liking for them.
Tyki is a major antagonist in the series. A vagabond in his spare time, he seems to have some title of nobility. Tyki is a handsome tall man with wavy, dark hair and a mole under his left eye in his mid- to late-twenties; according to Road Kamelot , Wisely , and Allen Walker , Tyki looks exactly like the late Fourteenth Noah. As a human, Tyki is a light-skinned man with brown eyes.