|“||The days of leaving the sea to the devices of humans are over!||„|
Gakuto, also known as Gaito, is the main antagonist in the first season of Mermaid Melody Pichi Pichi Pitch. He's the twin brother of Kaito and a child of the Phanthalessa.
Gaito has spikey gray hair and pink eyes. He wears lightning earrings with a loosely attached black robe with black pants and pointy shoes. He has a dark red necklace and is usually seen holding a rose, wine, or his staff.
When he was disguising himself as his twin brother in an episode, the only difference was Gaito's eyes, showing evil and hardness. He is apparently physically strong despite that he hardly does any sort of fighting throughout the series.
Gaito has a soft spot for Sara, the Orange Mermaid Princess. In the last episode when Sara joins the other mermaid princesses, Gaito was hurt and so had hardened his heart against her believing that he was betrayed. When Sara and the other mermaids confront Gaito in his room he starts releasing lightning. Sara tries talking to Gaito but he does not want to listen. Gaito electrifies Sara, causing Sara to drop on the floor. The other mermaids began singing leaving Gaito to weaken and lose his powers. As Gaito becomes powerless and his castle begins to sink, everyone starts to escape but Sara stops. She explains why she wants to stay with Gaito, and the two die together.
- His real name is Gakuto, which means educated person.