Zero (Mega Man X4)

Zero is Mega Man X's best friend and partner in the Maverick Hunters. Zero's past has remained a mystery, but after Zero's constant nightmares of his creator, it is now rumored that the evil Dr Wily created Zero to eventually destroy X. Although this may be the truth, Zero is still fighting for justice and has never turned against X. Zero is also heavily involved in the Repliforce mystery, but he has fallen in love with the Colonel of Repliforce's sister Iris, and is torn between his relationship with her and Colonel's refusal to co-operate.