I truly cannot comprehend the whims of the webnovel GIF search engine.
'Water spirit' becomes this.
Also, for those unaware, an Undine is a mythological water spirit, specifically, I believe, a type of lesser faerie
There is no ice nymph, but the snow ones are called Chione, spelled Khione.
Otherwise Nymphs of north winds would also work, since they are associated with cold.