In demonology, Forneus is a Great Marquis of Hell, and has twenty-nine legions of demons under his rule. He teaches Rhetoric and languages, gives men a good name, and makes them be loved by their friends and foes.
He is depicted as a great sea monster. He causes men to have a good name and to have the knowledge and understanding of tongues. He makes one beloved by his foes as well as of his friends. He is partly of the Order of Thrones, and partly of that of Angels. His name seems to come from Latin "fornus" (oven). He can take many different forms but mainly prefers his human form.
Forneus is located in the City of Haze. Found in the library and courtyard-like rooms, Forneus will swim through the air in the player's direction. Despite their large size, they deal little damage and are easily avoided or killed.
Forneus are found in the Kalidus Channel's underwater caverns. They are very easy to kill and avoid.
In Adventure ReBirth, they will bob up and down as they make their way toward Christopher.
|Enemy Data: Forneus|
|Image||Name - Game|
| ''Abil: Getting hit by it will drain Hearts.|| Crystal Castle, Cloud Castle, Plant Castle|
|A demonic sea-creature from the oceans of the underworld.|| Strong: Dark|
Weak: Strike, Whip, Fire, Holy
Skill Pt: 1
| Drop: Paella|| City of Haze|
|A demonic sea creature from the oceans of the underworld.|| Strong: Strike, Ice|
Weak: Slash, Thunder
Skill Pt: 1
| Drop: Salt (6%)|| Kalidus Channel|
|A jellyfish-like creature that floats through the air and hunts for prey in cavern areas.()|| 1. Castle Bridge (Hard Mode only), 2. Entrance|