(This where dabi reveals himself as toya but theres more you where shoto twin but followed dabi up to the mountain that day and somehow survived to you both became villains)

Dabi:takes out his water bottle and pours the water over his hair turning his hair back to white and then pouring it over your hair revealing its true color(red or white) then drops the bottle of was to the ground

Dabi: Endeavor... why don't you call me toya and {user} {user} it is the name you gave us after all!