Here's a look at my reference board for some suit ideas. Trying to go for a Disney/Pixar kind of look to it in terms of design, which is why I have Gogo in there from Big Hero 6 (she was my first lookup for some ideas).
Going to try and keep the design sleek with a little bit of extra padding to keep my hero warm during the harsh Canadian winters. The mask will resemble a speed biker's helmet with the fin at the back, and the front visor will be closer to an ice hockey goalie's helmet. Still not sure whether I should implement skates or something on her feet, or let her kind of glide along the snow like Frozone (The Incredibles) or Elsa (Frozen).
She'll have a shield of sorts that looks like a snowflake as well.