-The torn shirt (pg. 1-125, 130)
Boomer and Bethy found the shirt belonged to Todd Wilko, a passenger from Ship A who lost all his HoltCoins on the first. But what happened to him?

- The 6th floor (Pg. 1-77, 1-92, 1-157)
The group discovered the 6th floor was hiding Clove's body in a horrifying positioned state. But what was with the whispering? And the headaches?

- PI Jelly (pg. 2-94, 2-105)
Alex and Abeer decoded Dr. Melkinshiv's notes to find PI Jelly's main ingredient was the Gomikopi mushroom, an additive strain of fungi that causes brain damage in excess use. But why would he make it?

- The late night torches (Pg. 1-83, 1-111, 1-124)
The group found that the late night torches leads to the Bear Cave, which ultimately connects to the Forgotten Cave. Rufus was being held here. But why?

- Kopu Kopu's/Island pendants (Pg. 1-88, 1-102, 1-126, 1-136, 1-141)
Holt gives these out as a symbol of luck. They can only be truly crafted by Native Islander hands. 7 Kopu Kopu's opened the stone door in the Forgotten Cave. But is there a deeper meaning to them?

- Holt's previous assistant (Pg. 1-15, Pg. 1-55, 3-29, 3-44)
Dina and Eric found out that Daniel (Whitiker), Holt's previous assistant, was also Livie's late boyfriend. She came here to investigate what happened to him. That's why she carries his Kopu Kopu. But why did he kill himself?

- The Big Bad (pg. 3-93, 3-138, 3-144)
The Big Bad turned out to be Daniel. Holt's previous assistant and Livie's late fiancé. But how did he fake his death? And why did he do it?

- "Brooke" (pg. 4-97, 4-113)
Zach and Dina discovered that Brooke of Isle Amour was actually a siren. She tried to drown both of them, but Boomer later threw her out a window. But was she the only one?

- Isle Amour's "Holt" (pg. 4-72, 4-180)
Atsuto admitted to the group of being the owner of Isle Amour. He was entrusted to run this island with the help of the sirens, to make sexual deviants pay for their actions. His personal motivation for running the operation was his wife who had been raped, murdered and taken away from him. Atsuto believed that if people can't choose love over lust, they don't deserve to live. But who gave him an island?

- "The thing" (pg. 1-160, 3-15, 5-112)
The "thing" is a deah spirit. It collects the souls of those who have failed to resist their urges, draining their life to become one of them

- Rufus (pg. 2-43, 5-112)
Rufus Morales was turned into a bear for losing all of his HoltCoins

- Todd Wilko (pg. 1-103, 1-130, 5-112)
Todd Wilko become a wolf ghost for losing all of his HoltCoins

- Iceberg in the tropics? (Pg. 1-39)
This was only possible because Holt is the Devil

- Unnatural phenomenon (Pg. 1-52, 1-91)
The same applies here with how people were seeing ghosts and unexplainable things

- Forgotten Cave (Pg. 1-68, 2-153)
The Forgotten Cave was used as a "lair" for Holt and a "home" for the islanders. Inside was the Stone Kopu Kopu door, a translation book and a bunch of dead bodies. Along with Rufus while he was alive

- Forgotten Cave Door (pg. 2-157, 2-169)
This was revealed to actually be a doorway to hell. This room is where the spirits were locked in. The entrance to hell was hidden in the hall, with the use of the "giant Kopu Kopu"

- The Travelling Kopu Kopu (pg. 1-93, 1-101, 2-216)
The Kopu Kopus were enchanted by the islanders so they'd never be completely lost by the competitors. The islanders knew that purifying the Kopu Kopu would be the only thing to stop Holt