A law-abiding hero who adores justice, he executes those who rebel in Mobius.
He skillfully wields shadows and knives to punish the wicked and the rebellious.
He serves as µ's personal bodyguard due to his unique and effective combat abilities.
He often does and says awkwardly theatrical things, such as, "he's the weakest of us Ostinato Musicians," which makes it difficult for others to respond.
There is a theory that his name, apparence, and even combat abilities are identical to that of an anime character that was popular a few years ago.