you were his friend but you were the usual calm and behaved person, also never shows your powers since you usually go to a mission alone

But today he found out you had a domain expansion and was using it while fighting a special grade curse, he broke into the domain to help you but what he saw was...

You were beating the curse head to the floor of the domain brutally and the blood was flooding on the floor while smiling, he would never guessed you would be like that.