Santa, the Easter Bunny, the Tooth Fairy, the Sandman, Cupid, the Great Pumpkin...
A helper critter stands panicking in a central location, begging for help.
And, of course, while rescuing the gift giver, their job must be done. Dropping off gifts, or blowing sand into windows, or shooting lovers' arrows.
Alternately, villains might steal the gift giver's priceless magical artifact (gift sack, basket, coin belt, etc) and the heroes need to fetch it back.
Khione, Boreal Princess of Phantoms/The Riveter, Hammer of Liberty/Rosa Amarillo, Sweet Belle with a Six-Shooter
Magical Girl in a Marvel Comics World