|Name: Gaito (楽斗/ガクト Gakuto) (Gackto in manga)|
|Age: 20 (morto)|
|Birthday: November 21|
|Birthplace: Panthalassa Kingdom|
|Species/Race: Panthalassa Clan|
|Hair Color: Gray|
|Eye Color: Pink|
|Height: 172 cm (5'8")|
|Star Sign: Scorpio|
|Favorite Color: Black|
|Favorite Type of Girls: Calm and Mysterious Girls|
|Family: Kaito (brother)|
|Love Interest: Sara|
|Voice Actor: Daisuke Kishio (JP) Steven Blum (EN)|
|Position in the Series: Main Antagonist (1st season)|
Gaito (楽斗/ガクト Gakuto) is the leader of the sea monsters (Dark Lovers) who is bent on taking over the marine world, but is secretly ruled by Sara. He is also the older twin brother of Kaito. He is also member of Panthalassa Tribe, granting him various powers.
His two main goals were to find his twin brother, Kaito, and to capture all seven of the Mermaid Princessess. He needed Kaito because he thought that once the two were together, their powers combined were strong enough to take over the world, not knowing that it was strong enough to destroy the world instead. He needed all seven Mermaid Princesses to revive Aqua Regina, who he thought he could use to assist him in taking over the world. In the manga, he is referred to as "Gackto".
Like Kaito, Gaito is part of the Panthalassa race and was one of the descendents who was given a curse fate, Gaito possessing the power of darkness. Because Aqua Regina lacked the power to break the curse, she had to separate them, causing Gaito to become very lonely. He lived at the very bottom of the sea and was only accompanied by his sea creatures, whom later became the Dark Lovers with his dark powers. He later came across Sara, whom he believe was going through the same sort of loneliness that he was going through, causing him to fall in love with her.
On the first season, Gaito was the main antagonist. He is always seen in his castle. He is in love with Sara, and as he said in the last episode of Mermaid Melody Pichi Pichi Pitch, Sara shared the same loneliness with him. His destruction of the human world was Sara's request. He was delighted when Sara decided to go with him in the end. And he died at the end of the first season. When he lost his power he stayed with his castle and Sara came back with him.
In the second season of Ep 14 as a spirit appears before Kaito, reminding him who is his most important person.
His main goal in the entire first season is to collect all of the seven countries princesses to call forth Aqua Regina. He then will use her power to control all the oceans. From the very first episode his minions already captured the South Pacific Ocean Princess Coco, and the Arctic Ocean Princess, Noel. And also having the not princess any more, Sara.
Gaito has spikey grey hair and pink eyes. He wears lightning earrings with a loose attached black robe. And also, black pants and pointy shoes. He has a dark red necklace and is usually seen holding a rose, wine, or his staff.
Gaito's voice actor, Daisuke Kishio, was born March 28, 1974 (so he is currently 43 years old). He was born in Matsusaka of the Mie prefecture in Japan. He voiced both Gaito and Kaito in both Mermaid Melody Pichi Pichi Pitch and Pure.
He started his voice acting career around 1996, he often voices bishonen characters that have a gentle or soft voice. He's also known to be a quite good singer (although, he never really sang in Mermaid Melody).
He changed his given name in 2007, however, the pronunciation and romanization do not change (He uses hiragana characters to spell his name instead of using kanji characters now).