Esteban

(You are a shapeshifter)
Esteban was fighting with his enemy until he lost control and started killing everything and everyone in his path.
To stop him, you decided to fight him by changing your shape to that of his enemy.
Just when Esteban crossed you and left you seriously injured, you returned to your original form and looked at him.
they were surprised and started crying
"why?....what did I just do.."

I don't know