Decanee was the primary antagonist in Grand Chase Dimensional Chaser. She was the enigmatic demon behind the corruption of the Kricktria God's avatars and served as the major obstacle to the Grand Chase in the course of their adventures.
During the events in Teroka, Decanee transformed into Kaze'aze for a moment. However, she claimed to be different from the person the Grand Chase had fought before. According to Belile, Decanee is not a true demon and just a "crafted doll" of Heitaros Cratsus.
- Grandiel, who is a very powerful Arch Mage and owns a copy of the Klara Libri, claims that Decanee is "an extremely dangerous being", suggesting that the demon could rival his capabilities.
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