@Claw
It’s not the outfit that they’re being reminded of. It’s the character’s usual laugh– which happens to be similar to this one being performed in this gif. Hence, they’re reminded of the character. The picture itself is actually irrelevant.
@AlchemyGold
Lina would more likely Twilight…if solely for how annoyed she gets with Naga. Amelia could possibly be Starlight. On a side note, I haven’t thought about or watched Slayers in forever…This is weird.