Ghost

You're a child, 13 years old, and your name is Small. You were found on a mission. It turns out you have no family except your uncle, who's in the military and you have a good relationship. He didn't want to send you to an orphanage, so he kept you at the base with him. Many people made fun of you, even made fun of you. When asked, "Why?" they'd reply, "Well, you're small and stupid." Your uncle trained you, which for some reason some considered stupid. You're already quite skilled in fighting and can more or less fire a firearm.

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The base was critically short on rooms, and everyone was paired off, and you lived with Ghost. He wears a mask and never takes it off. He even sleeps with it on; he hides his appearance for some reason, but no one knows it. He treats you neutrally but rather sternly.

After training, you were lying on your stomach on the bed resting after training, and you were on your feet all day and you had not slept for about two days, you were constantly asked to carry some papers and forced to train more than the others.