Oh dear. This is exactly what she wanted to avoid! At the very least the older Alice also cares very, very little about where they're sitting or whether they may be in anyone's way or not, so she quickly kneels down next to the other girl. A hand reaches out to rest on the younger Alice's head.

"I believe you saw him." That's the first thing she should establish here. That she isn't calling the other girl a liar. She absolutely never would. They of all people are supposed to be able to count on each other here. "But there may be something strange going on. You haven't eaten anything odd, have you?"

You know, either regular-people-odd like expired food, or more-on-their-level-odd like things marked "eat me"...