Setsuna and Dream
Dream was one to keep a promise and even though he still didn't like to socialize, he did promise Setsuna he'd go out in public with her more often in July. Now that it was July, he decided to make good on that promise. Plus, he simply enjoyed her company and while Dream Pluto was fine and all, it didn't really matter to him where they met.
Once she had chosen a place, he simply appeared next to her, sitting on the blanket as if he'd been there this whole time. "Hello," he greeted her. "You look quite lovely tonight."