The request has a smile growing on Kamui's face. It's a simple, even innocent request. Corrins are all about their family, after all, so it's not something any would make lightly. Besides, it's far from a bad way of describing their relationship.

"A twin sister...I like the sound of that! We look and behave enough like each other to make a convincing story. It'd be an innocent prank, for certain...ah, but you've been here too long for that, perhaps. All the time, I'm on board...sister."