Though they seem too old to readily notice her, Ginia casts Umbra on herself as a safeguard before she heads over to their table. She takes pictures of the cards on the table, their hands, and even angles her phone to get video as she rapidly rifles through their decks. She does the same for two other teenagers playing nearby, finishing with pictures of everyone in the store. Maybe the owner or kids will recognize some of the other people.

Sending some pictures you can compare to deck lists, also pictures of people here.

I'm going to wait for them to finish their game and see what they do next. If they begin heading to the shop, I'll delay them.