["Planet" is not the word he expected to hear, but he doesn't bring it up. Instead something else catches his attention.]

It seems we have more in common, then.

[His expression is sincere, but also slightly concerned.]

I am also searching for my sister. My twin, actually. I don't know if she ended up here, but if you happen to see a blonde haired girl similar to me, then I would appreciate the information.

[Considering how this place pulls in various people, maybe it wouldn't be so surprising if Lumine showed up here at some point. Maybe for that reason alone it's worth asking.]

Of course, if I see anyone who looks like your sister I will let you know.

[They could help one another. Isn't it a fair exchange?]