Giga Mermaid is a mermaid character from Shantae: Half-Genie Hero. She is the queen of the mermaids in Mermaid Falls. She was kidnapped and chained by Techno Baron, whose plan is to make Counterfeit Mermaids & Shantae must rescue her from his clutches.
- Giga Mermaid is similar to Cala Maria from Cuphead: Don't Deal with The Devil, as they are giant mermaids who are bigger than the people around her. She also has some similarities to Shirahoshi from One Piece, as they are both giant mermaids with a good heart.