Hephaestus

Hephaestus is the Greek god of blacksmiths, metalworking, carpenters, craftsmen, artisans, sculptors, metallurgy, fire, and volcanoes. In Greek mythology, Hephaestus was either the son of Zeus and Hera or he was Hera's parthenogenous child. He was cast off Mount Olympus by his mother Hera because of his lameness, the result of a congenital impairment; or in another account, by Zeus for protecting Hera from his advances (in which case his lameness would have been the result of his fall rather than the reason for it).
However, in world, Hephaestus is most notably the the creator of Oto, and the person who discarded him. Creating Oto as a weapon to kill a god, Hephaestus' motives are as of yet unknown, however it is known that he has withdrawn from the world in anger as some of his "things" have been moved by The Owl and Spear Sect who have what is believed to be a sibling of Oto's.