Seaick Tribe

The Seaick Tribe (ランディック族) is a calm-headed Gosei Angel tribe, with power over the water element. It is one of three tribes, along with the Skick and Landick Tribe, which make up the Tensou Sentai Goseiger, with Hyde ( GoseiBlue ) representing them. His brother, Magis ( GoseiGreen ).

Hyde
Hyde (ハイド) is the oldest of the group and the lone member of the Seaick Tribe, after the death of his partner Magis. Because he is the oldest, he is wise and usually calm, often paying very close attention to detail no matter how trivial. Whenever he calls Moune childish because of a mistake she makes, she will respond by calling him an old man. He serves in keeping the team together. After transforming into Gosei Blue (ゴセイブルー), Hyde says, "Seaick Power of Surging Waves! Gosei Blue" (怒濤のシーイックパワー！ゴセイブルー). As Gosei Blue, he can perform the Seaick Spin (シーイックスピン). With the Gosei Tensword, Gosei Blue becomes Super Gosei Blue (スーパーゴセイブルー), saying "Miraculous Surging Waves! Super Gosei Blue" (奇跡の怒濤！スーパーゴセイブルー).

Hyde is portrayed by Kento Ono (小野 健斗).

Magis
Magis (マジス) was a member of the Seaick Tribe and the former partner of Hyde. Prior to the beginning of the series, he was killed by Kurasunīgo of 5000°C after sacrificing himself to save Hyde, briefly transforming into Gosei Green (ゴセイグリーン) to do so. Magis only appears in flashbacks; first in Epic 10 "Hyde's Partner", and again in Epic 39 "Epic Zero".

Magis is portrayed by Yousuke Ito (伊藤 陽佑), who previously portrayed Sen'ichi "Sen-chan" Enari in Tokusou Sentai Dekaranger.