Tirsiak is a beautiful, human-like forest spirit, with a lithe and curvy body. She controls shadowy animal spirits, summoning them to aid her in any given task, and has an affinity with living animals as well. Her home is the snowy woods of the Yukon region, but she is also forced to hunt visitors in Spooky's Mansion, where she is known as Unknown Specimen 4.
Tirsiak brutally dispatches those who disrespect nature, but makes an effort to spare & even rescue those who are kind to it.