Chara nods, a dismissive movement. No need to thank them. No, really, don't. The sudden request surprises them.

*Yes please!

...that's one person on board. Chara has no strong feeling on having tea right now - there's things they want to do but nothing immediately urgent - so they nod again, once. They can indulge this Frisk. Neither kid is making the connection between the offer and Chara's damaged throat, so to them it seems like the other Frisk is deliberately changing the subject to offer a distraction, something they have no problems abiding by.

[Lead the way.]