In “Moana,” the demigod who helps Moana is Maui.
Maui is a legendary trickster, shapeshifter, and demigod who joins Moana on her mission to restore the heart of Te Fiti. He initially refuses to help, but the two gradually become partners as they face monsters, dangerous seas, and Maui’s own doubts about his past.
Maui carries a magical fish hook that enables him to transform into different creatures. The hook also connects the film’s character to Māui, a culture hero who appears in several Polynesian traditions. Disney’s Maui is a fictional interpretation rather than a complete retelling of any single tradition.
The other options have different roles. Tamatoa is a giant coconut crab who guards Maui’s lost hook, Heihei is Moana’s easily confused rooster, and Te Fiti is the goddess whose stolen heart sets the story in motion. Maui is voiced by Dwayne Johnson in the 2016 animated film.