The Insomnia artwork resembles a huge mirror with a large inlaid gem on top that can be closed with a double door. According to the curator of the museum in which is was held, it is a purely decorative item, and the doors are designed to emphasize the feeling that viewers are located both where they stand and in their reflection's place.
To blur Daisuke Niwa's sense of reality, Insomnia takes a human form that looks like the latter's appearance, but with hair that spikes from the back to the fron and changes from white to red as Insomnia grows stronger.
Insomnia is an artwork known for bringing bad luck to its owners. It has been given away numerous times, as people lose themselves in their reflection until they are unable to recognize reality; its first victim is its creator, who was never seen again. Insomnia eventually ends up in one of Azumano's museums.
Insomnia actively suppresses resistance to its reality by putting its victims to sleep so they forget their doubts. It can sense when outsiders have entered, thus Satoshi is quickly removed after using a small mirror to send a projection of himself into the world and Dark must take on a shrunken form to stay with Daisuke.
As a final blow to Daisuke's shaky sense of identity, Rokuto invites the fake Riku to a dance party in front of Daisuke. Risa, who realizes her sister isn't her usual self, opposes Rokuto and defends Daisuke, going so far as inviting Daisuke to the dance party herself and concocts a plan to take the fake Riku's place and test Rokuto's feelings.
During the dance party, Rokuto doesn't recognize Risa in disguise so she criticizes him for being shallow. Furious, he drops his mask and reveals he took Risa to his world because she called him sinister.As the world of Insomnia crumbles, Dark battles with him so that Daisuke and Risa can follow escape by following Satoshi's white feather to the entrance of the mirror. Seeing their panicked reflections in the mirror, Riku breaks it and frees them, destroying the artwork in the process. His last words are for Riku, expressing confusion since she had told she liked him.
Mute EditMute is a reflection of Dark in the mirror that is Insomnia. Created by Insomnia, he also wants to take their originals' place and go to Daisuke's world.
He helps Rokuto with bringing Daisuke to the world of Insomnia, and pretends to be Dark in a fake heist, after which he attacks Daisuke. Dark and Satoshi, who are watching over the boy in the real world, protect him and make the assailant fly away.
Rokuto briefly changes into Mute when he fights Dark.
Mute is not identical to Dark: his hair is short and spiked, and he wears a feather earing on his right ear. His wings are also stylised.
At first, Dark is uninterested in Insomnia, much to Daisuke's surprise. The thief says that he doesn't want it because it would be too much work. Nonetheless, as the mirror's power grows stronger, he expresses curiosity. Gallery
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Manga: Stage 4, Part 9; Volume 15
- ↑ 2.0 2.1 2.2 Manga: Stage 4, Part 1; Volume 14
- ↑ 3.0 3.1 3.2 Manga: Stage 4, Part 10; Volume 15
- ↑ 4.0 4.1 4.2 4.3 Manga: Stage 4, Part 2; Volume 14
- ↑ 5.0 5.1 Manga: Stage 4, Part 7; Volume 15
- ↑ Manga: Stage 4, Part 4; Volume 14
- ↑ 7.0 7.1 Manga: Stage 4, Part 5; Volume 14
- ↑ Manga: Stage 4, Part 6; Volume 14