The Lobster Siren is a minor character making her first appearance in Shantae and the Seven Sirens. Her design is nearly human, but she has a lobster tail coming out of the rear as well as lobster antennae. Unlike most of the Sirens, she is much calmer and has a supporting role.
Lobster Siren was one of the Seven Sirens, she initially helped the other Sirens by using her teleportation magic to kidnap the Half-Genies during the festival. However, she shortly after had a change of heart and defected.