Thistle  

Sissel, The Lunatic Magician, The Mad Sorcerer, シスル

Sissel is the mage who created the dungeon on The Island. He is known for being irrational and not engaging in reasonable conversation. He is highly devoted to King Delgal and the Golden Country. When he becomes frustrated, he tends to inflict self-injuries such as scratching his head until it bleeds or biting at the tip of his thumb. As the lord of the dungeon, Sissel possesses significant power over both its structure and the monsters that inhabit it. His lifespan has also been extended due to the dungeon's power. Sissel frequently alters the structure of the dungeon, often causing it to open up holes in the ground to eliminate enemies or escape himself. For monsters, he summons them or directs them to perform specific tasks (like having the Red Dragon search for King Delgal). Sissel seems particularly fond of using small dragons known as "the magician's eyes" to sense and alert him to any changes in the dungeon. In the English translation by Yen Press, his name was changed from "Thistle" to "Sissel".