Poseidoness is the queen of the Northern Seas and a boss in Monster Girl Quest: Paradox.
Monsterpedia Entry
Attacks
Strategy
Evaluation
"How many times people have watched you... Sheesh. Poseidoness is a difficult enemy who uses powerful Lightning and Tentacle attacks. Fighting normally will make this a difficult battle. She's a sea-dweller so she is weak against Earth and Lightning. On top of that she can be inflicted with Sleep, Paralysis, Blind and Mini. Now go, oh Brave Luka. Give your judgement to that stupid monster posing as some sort of Queen."