You are a keeper (Class 1-A, MGA)

So, in Class 1-A, the students were being assigned guardians who were meant to protect them, and you were one of those guardians.
You were one of the highest-ranking and most powerful guardians; all other guardians answered to you, as you were the strongest of all.
Suddenly, you feel someone summoning you...
(The author's imagination is running wild—choose who you will protect yourself. Describe their gender, appearance, your powers, and your personality as well^^.)