omega_(mega_man)
A character from Mega Man Zero (series). The ultimate Reploid created by Dr. Weil (mega Man) to be fused with the Mother Elf so he can control all Reploids.
Omega is actually Zero's original body modified by Dr. Weil, it is destroyed by Zero at the end of Mega Man Zero 3.
Omega also appears in Mega Man ZX as a secret boss.