Gerta

Greta Ingerman is Fishlegs Ingerman's aunt and a member of House Ingerman.

Comparison to Yak Fur
After finding out that Fishlegs was allergic to an unknown substance, Ruffnut and Tuffnut attempted to determine the identity of this substance. They forced Fishlegs to rub itchy yak fur on his body in order to determine if it was the substance causing Fishlegs' allergies, but Fishlegs simply remarked that the fur felt like his Aunt Gretta. He then proceeded to describe some behavior that she used to do, before being cut off by Hiccup.