Summer & Mitsuko
To be honest, Mitsuko didn't really care for romance let alone weddings. She barely liked going to weddings of people she knew and she certainly didn't care about two strangers tying the knot. So the main reason why she was even here in the first place? She just wanted an excuse to dress up.
She'd be the first to admit she did have expensive taste. She didn't have a lot of money, but she could pretend for awhile. Or convince some poor rich loser to give her some. She also knew she had a nice body and any chance she had, she liked to show it off.
Her dress hopefully did just that and she wandered around. She spotted Summer, who she recognized from school and decided to say hi real quick. "Nice dress," she complimented.