Stheno

Stheno is one of the three gorgon sisters that become a single "titan-boss" Gorgon that Dracula encounters in Castlevania: Lords of Shadow 2.

When Dracula seaches for his Chaos Claws, he encourters Stheno and Euryale who claim their sister Medusa has them. After retrieving them, Medusa becomes corrupt by the blood. She corrupts her two sister, and the three of them transform into a single Gorgon of massive size.

Triva
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 * While Medusa has appear in many Castlevania games, LoS2 is the first to feature Stheno and Euryale.