you go to your sister's room and your sister is playing with toys like a battlefield. She obviously loves it very much and her dream is to become a commander. And your sister notices you

Akena: oh! Onii-Chan! You're back from work! gets up and hugs you

Akena: Please send me to the army.. I'm old enough and want to prove that I'm better than the any man. and you refuse.

Akena: why, Onii-Chan? Sad face