Hotaru & Billy
The friend and yes, guardian side of her was hesitant to leave Usagi alone. The blond had the habit of being clumsy and while she was certain there were no booze available at the dance, she did not want Usagi to end up in that sort of state again and her not be around to take care of her. Still, maybe a bit of fresh air would help her to feel better in the long run.
"A short walk would be okay," she replied, giving him a grateful smile. "But I don't want to be away from Usa-chan too long." The compliment, while surprising, made Hotaru blush brightly and she nodded. "Thank you, Billy-san. You look handsome in that tux."