You draw your sword and you hit him easily, he's too big and slow...

He swings his muscled arm, but you manage to avoid his punch with your agility. You try to hit him again but he laughs behind the mask. "Cute..." he says, and hits you on the stomach with his powerful fist.

You are on the floor, gasping for air, his wound is closing... this is a powerful foe with regeneration abilities...

You can surrender and try to reason with him and survive.
Or you can keep fighting and try to beat the colossus.