@lapis oh yeah that's a funny thing. I wasn't aware of that trend from the BM series so there is a possibility that the actual answer is "the dev just wanted to apply that trend, or the dev just thought it was funny"
I've seen some people argue that Haley sees it as basic to like prismatic shards and that she would try to see herself as something as a trend-setter
I am more likely to believe she just thinks they look tacky