I have found Auntie in MCLAL Kentin episode 2. You can find her in the restroom after you have talke

I have found Auntie in MCLAL Kentin episode 2. You can find her in the restroom after you have talked with Rosalya and Alexy in the dinner hall, and before you go to your room. She will give you a backpack and her part cost 14 AP. Here is her summary: Auntie comes out of the toilets all smiling. Auntie didn’t expect to see you here. You ask how she is and what she is doing here. She says the same thing as you come to do here. But a little bird told her that you will need this. She gives you a backpack and tells you to answer the call for the great outdoors. You thank her and say that this might be useful for once. Auntie asks what that means, and you tell her to never mind. Auntie gives you a hug and leaves. -- source link

More pics about