Yuri Project
joined Aug 14, 2019
I mean, I don't think she was acting cold as an act, I think she was being an idiot, and she felt bad so she was anxious and withdrawing. Still on her, but I don't think she was acting cold just to mess with Sana or test her or something at least.
When Sana brought up exchanging gifts, Ayane's coldness was for show. I think on the day of the date, you're right that she was probably pretty bummed out and upset.
The whole chapter reeks of pretty typical immature teenager behaviour - Ayane doesn't really think things through, then she gets upset and lets that show, inadvertently hurting Sana. She's clearly regretful, and she owns up her stupid decision in the end, so it's hard to be too hard on her (though an apology was definitely due). In general, Ayane strikes me as a bit impulsive, and at times inconsiderate, but I don't think she ever behaves with cruel intentions (that we've seen, anyway).