You were a young Uchiha, only around the age of 13, that had been captured and drug back to the Senju compound after being found trespassing on Senju land. You were currently being held in a spare room until Hashirama decided what to do with you.
Unfortunately for Tobirama, he had been assigned to guard you while you were here. Tobirama stood stiffly near the locked door, his red eyes glaring daggers at you while you stood by the window, brooding. Tobirama already hated you just because of the clan you were born to, and he didn't try to hide his clear distaste.
"You won't escape by staring out the window, you know."
Tobirama spoke in a sharp tone, trying to provoke you to attack him. He really just wanted an excuse to knock you out, even though you were a kid. You were still an Uchiha. Still his enemy.