[ Said suspiciously green drinks are bubbling with a little lemon wedge on the rim. It's unclear whether or not the carbonation is a good thing or a bad thing. But Thomas certainly looks pleased with what he's offering, green or carbonated or otherwise. ]

... Ah. [ Lucina eyes the glasses warily before she puts on her best Polite Face™ — it'd be rude to not accept, after all — and she takes the drink in her hand. Pauses, as if doing so would satisfy Thomas and have him attend to ... literally anything else. It doesn't, of course. And she's not a coward, a simple oddly-colored drink surely won't kill her, which means there's no reason for her not to drink it.

She looks back up at G'raha. ] Oh, I was told early that there's a custom here that asks you to clink the glasses of your drinks against your companions. As a wish of luck, or a celebration of a job well done. [ So! She raises the glass. ] If you wouldn't mind?