Idunn is Bragi's 'wife'. 

she currently has no reference, but appears in 2 forms. 

one form has red/green apples on vines on her left side, with a white body, black striped hooves, brown eyes and a green mane and tail. 

the other form is a cream/white body, brown eyes and a green mane and tail.

her ref will appear pretty soon, probably.