[Kurona]

Well, take away the in-story function for a moment and just focus on the toys themselves -- the main draws will be electronic and kinetic function and aesthetics. In other words what the toy does and how it looks; I certainly know a fair few people who have been drawn to the Desire Driver just by Beat than anything else.

On the other hand if you're looking at it from a pure cosplay angle... well, Fever is more a workaround to a form rather than the main way to get it. If someone wanted to cosplay Punkjack they'd probably go for the Monster buckle first since that's part of his usual look. I could definitely see someone using the Fever buckle but probably just as a fun option in the same way someone might use the Decadriver in their Wizard or Kabuto cosplay