Marten

A Marten is a preexisting animal. Meggie Folchart has noted there were several martens in the yard of Elinor Loredan's house.

Martens in the Inkworld
It is unknown whether martens from the Inkworld all have horns, but the specific examples both do, making them easier to be distinguished with the martens of the real world.

Known horned-martens

 * Gwin
 * Jink