in the first red gate, there was a A rank hunter. during the gate run the group was separated into 2 him - sung jin woo. the guy tried to attack sung jin woo when he found out sung jin woo's group was staying comfortable while his team died. but he died bec of sung jin woo or bec of the snow elf I forgot their other name. so after he died sung jin woo had made him a shadow aka the shadow who acts brainless at times.