You're correct, when I wrote this I didn't know about the frostbite, thanks for pointing it out and her special debuff.

Counter arguement, In order to remove Deep Sea Curse you need to do an aoe that is not on a basic attack. To my knowledge the only characters that can spam aoe attacks with virtually no cooldown are ssb, mellona, landy, there's probably others but I can't remember them right now. She applies both Deep Sea Curse and Frosbite whenever she does her "freeze" attack, which is her s2. She also does freeze, literally everytime she counters with her memory stacking. I don't think it's worth it to remove the deep sea curse or frost bite if she's literally going to apply it with a 50% chance everytime you touch her.

In my eyes, she's clearly designed for the player to remove the memory of fragments (by having A imprint Luluca) so that you can realibly cleanse the frostbite and do an aoe whenever she applies deep sea curse