Seiko Omori (大森 聖子,Ōmori Seiko) is the assistant karate instructor of Sakura Igarashi who was manipulated by Amahiko Haitani into forming a joint contract with him and the Planarian Deadman, merging with it to become the Planarian Deadman Phase 2 (プラナリア・デッドマンフェーズ2,Puranaria Deddoman Fēzu 2).
Seiko Omori is the assistant instructor of Sakura Igarashi's dojo and often brings her son, Ryou, there. Though Seiko's hard on Sakura when it comes to the pursuit of strength. Amahiko Haitani manipulates Seiko into doing his bidding by promising that he'll get treatment for Ryou, who is ill. He uses the Planarian Proto Vistamp's ability to replicate itself and gives it to Seiko. Haitani first has Seiko attack a bank with the Planarian Deadman in order to steal money for her son's treatment. When Seiko leaves the dojo to go there and leaves Ryo behind, Sakura sees the Planarian Proto Vistamp in her purse and follows her. Seiko is confronted by Sakura at the bank, but she gets a call from Hikaru saying that Ryou collapsed and the two go to the hospital while the Planarian Deadman is destroyed by Kamen Riders Revice and Live. Seiko is told by the doctor that Ryou needs immediate surgery, as he might not survive another seizure. When Seiko asks Haitani for help, he tells her to find a doctor at the hospital that he says can perform the surgery. He also instructs her to enter a joint contract with his Deadman.
When the Planarian Deadman attacks the hospital and Seiko finds the doctor, he tells her that he is only a radiologist. Fenix arrives, and Seiko merges with the Deadman to become the Planarian Deadman Phase 2. Revi and Live defeat the Deadman and separate Seiko from it, but Haitani creates another Planarian Deadman that he uses to take her away. Haitani convinces Seiko to become a Phase 2 Deadman again and stage an attack along with the normal Planarian Deadman. Fenix arrives to stop them, but when Kamen Rider Demons is incapacitated while Julio and Orteca join in on the attack, Kamen Riders Revice and Live become overwhelmed. However, Sakura Igarashi arrives and transforms into Kamen Rider Jeanne. She destroys the Planarian Deadman as well as the Phase 2, separating Seiko from it once again before she is apprehended by Fenix. Afterwards, Daiji Igarashi asks Fenix to help with Ryou's treatment. Sakura assures to Seiko that Ryou will be alright and is still strong.
Planarian Deadman[]
Planarian Deadman Phase 2
"Planarian!"
―Transformation announcement via the Planarian Proto Vistamp[src]
Statistics
Height: 199.0 cm
Weight: 93.5 kg
The Planarian Deadman and a person other than its host have been united by a joint contract that makes an advanced contract using a duplicated Vistamp. By repeating this, it is possible to mass-produce Phase 2 Deadmen from one Vistamp. By entering Phase 2, they have gained super-regenerative power in exchange for the risk of not being able to return to human form. Furthermore, it has been confirmed that when the original host makes an advanced contract, they become a powerful individual with more strength than the joint contract.
Arsenal
Nodarake Arms (ノウダラケアームズ,Noudarake Āmuzu): A polearm formed by the Planarian Deadman Phase 2 ripping off its hand, which then regenerates.
Abilities
Regeneration: The Planarian Deadman Phase 2 can heal from its wounds instantly, including regenerating appendages.
Energy Slash: The Planarian Deadman Phase 2 can perform yellow energy slashes with Nodarake Arms.
Energy Balls: The Planarian Deadman Phase 2 can launch numerous orange balls of energy from the end of the Nodarake Arms.
This article is about a character in Kamen Rider Revice.
Kamen Rider Revice