Like its prior forms, Aurostice seems to be directly based on a yuki-onna, a yōkai from Japanese folklore.
Statistically, it is a potent special attacker with high power and above-average speed, though its movepool is too lacking to truly complement this. Also, defensively, it only has one resistance to itself, Ice. Its defensive stats are lacking as well. Nevertheless, its early availability and Ice-type moves make it a solid choice for a team member.
Be sure to give Maidawn an Everstone until it reaches level 35, as Aurostice cannot learn Ice Beam through any other method.