Tapu Koko
Tapu Koko's mask appears to be a stylized rooster. Its overall design is also similar to a totem pole. Additionally, it may be inspired by Kūkaʻilimoku, one of the four major Hawaiian gods and god of war and conflict, who is often represented by feathered idols.
Tapu Koko may be a combination of tapu (Hawaiian for sacred or holy) and kokō (Hawaiian onomatopoeia for a rooster's crowing).
Kapu-Kokeko may be a combination of kapu (Hawaiian for sacred or holy) and コケコッコー kokekokkō (Japanese onomatopoeia for a rooster's crowing).
Tapu Lele
Tapu Lele appears to be based on a butterfly emerging from its chrysalis. It may also be inspired by Kāne, one of the four major Hawaiian gods. Kāne is a creator god, bestowing life into the first human in Hawaiian mythology.
Tapu Lele may be a combination of tapu (Hawaiian for sacred or holy) and pulelehua (Hawaiian for butterfly).
Kapu-Tetefu may be a combination of kapu (Hawaiian for sacred or holy) and てふてふ tefutefu (an old way of writing butterfly).
Tapu Bulu
Tapu Bulu, with and without its shell closed, appears to be based on a bull. It may also be inspired by Lono, one of the four major Hawaiian gods and god of agriculture, abundance, and peace.
Tapu Bulu may be a combination of tapu (Hawaiian for sacred or holy) and bull.
Kapu-Bulul may be a combination of kapu (Hawaiian for sacred or holy) and bull.
Tapu Fini
Tapu Fini's appearance when it closes its shell resembles a swordfish or a marlin. When its shell is open, Tapu Fini resembles a mermaid or Siren. The hinged shell itself is similar to many bivalves. It may also be inspired by Kanaloa, one of the four major Hawaiian gods and god of the ocean. Kanaloa's association with the underworld may inspire the Ruins of Hope, Tapu Fini's shrine, said to be where "life ends its journey".
Tapu Fini may be a combination of tapu (Hawaiian for sacred or holy) and fin. It may also derive from finish or final, referencing the fact that the Ruins of Hope are where "life ends its journey", and also, possibly, that Poni Island is the final island in the island challenge.
Kapu-Rehire may be a combination of kapu (Hawaiian for sacred or holy) and 鰭 hire (fin).
