[He nods. It seems they both think alike and cherish their family deeply.

Aether's expression falls after a moment.]

But sadly, my sister and I have been separated. She was taken away by a being that I have never encountered before. I've been searching ever since: for my sister and for the thing that took her.

[Which is why he became an adventurer and took all the commissions to slay various monsters, all in hopes of tracking the mysterious creature responsible for the twins' separation.]

I know my sister is out there, alive and well. I gathered enough evidence to confirm that, but I'm yet to see her again.