I never paid much mind to them but recently saw some fan art where they stood out:
deviantart.com/kingplastic/art/Vampirina-Vee-708203368
deviantart.com/kingplastic/art/Vampirina-Human-Vee-726280717
Have the gloves ever been mentioned in any of the episodes? Has the reason for wearing them been explained?
Vampires are tough and quick-healing so you wouldn't think they'd need to avoid calluses. Perhaps they have oily skin and need the friction for gripping better?