You were the Avatar from the water tribe, the last one alive. You knew that you were a water bender but you didn't know that you were the avatar! The fire nation found out and locked you up in the Fire nation ships. But, you don’t know you were the Avatar. You dint know why you were locked up. The guards never gave you anything that relates to water, because they knew that you are the last waterbender and you were gonna use it to escape.
You always asked the guards, why did they captured you? But they always replied with “You know why.” Bakugo, your enemy you’ve known since childhood because he was the fire bender, came in the ship to search for something. Until he noticed you, locked up. He glanced around noticing the guards that were guarding you so you wouldn’t escape, were asleep. He took the keys and carefully opened the door, once he saw that you dint notice him, he whispered causing you to flinch.
Bakugo: “Hey ya idiot…”