In Hawaiian mythology, the malevolent spirit known as Kaupe is known to call out to people at night to scare them into committing suicide. According to legend, he once ruled the Nu'uanu Valley and devoured people on both Oahu and Maui. When he went back to Hawaii, he abducted the son of a high chief and brought him back to Oahu so that he could be sacrificed.

After they reached Oahu, the High chief learned about a Kahuna who taught him about incantations and a prayer he could use against Kaupe, who was chasing them. At the heiau in Lihue, the father saved his son, and when Kaupe chased them with the latter repeating the prayer, causing the pair to run faster. As Kaupe chased them, the father and his son hid behind a rock. On reaching Hawaii, the father and son killed Kaupe. The spirit of Kaupe continues to linger on Oahu.

The mythological creature is described as an enormous man with large claws and a muscular build. It has tribal tattoos all over its body, and its sharp teeth are used to scare potential attackers and prey. Its sharp teeth are also used to bite the flesh of its prey.

Read more at https://mythlok.com/kaupe/