[this sure is familiar. Except... he was on the other side of it, with that larvitar. But instead of reacting defensively like Bertholdt, Eren holds up his hands and offers gentleness.

Because hahaaaaa. He knows that look. He knows that sound of panic in Sora's voice. Something bad happened]

W-well, it wasn't my choice. She followed me home when I explored the iron mines for the first time because she thought I was strong and could protect her. I didn't want to say no... [Eren tries to relax a bit] ... Bad experiences with bats, huh? I won't ask if you don't wanna tell me. But I promise you, Rosa won't hurt you. She's a real weenie.