Annette would admit that she was surprised to hear Misaka was going as well, only to immediately chide herself for that silly thought. Of course she would be going, given that it was an important social function, and she had her own societal expectations to meet. the foreigner herself was busy enough as it was, and she could only imagine what it must be like for Misaka, as one of the top Level 5's in the city. It was probably difficult for her to get a simple moment to relax. At least, so she liked to think.

"That's interesting," she replied without letting any of her inner thoughts sneak out to be noticed. "A party for charity is always worth it." She might not be able to remember the charity in question, but she knew it would be that. And it would provide for plenty of opportunities for all of them, to meet new people, and she had heard there would be a few prizes there as well for entertainment. 

She smiled then, tilting her head as she finished up on that thought. "Well, I will look forward to seeing you there."