|Hair Color||(Fur) Ash gray|
|First Appearance||The Maelstrom|
He has gray fur and resembles a translucent wolf with tigerlike stripes. He has glowing, yellow eyes and a wolfish snout and ears. Similar to the famous Alice in Wonderland character, the Cheshire cat, Grendel sports a wide, mischievous grin
He shares a strong bond with his steward, and is loyal to him. He appeared when William went missing, and helped the academy to search for him. He has a sense of duty as well, as shown when he tried to protect Max from Cooper when he was possessed.
Like all cheshirewulfs, Grendel is a skilled tracker and assisted the academy in finding William Cooper.