Riko Saida

"I... believed in you. Komon-kun, I know you would be able to protect everyone."

—Riko's words in Komon's memories.

Riko Saida (斎田リコSaida Riko) is a woman who appeared in Ultraman Nexus Series. She's Dark Faust's human host created by Dark Zagi.

Ultraman Nexus
She was Kazuki Komon's girlfriend. She looked beautiful and kind but she was actually dead, killed with her family by Mizorogi Shinya a year before the series just after she first met Komon, she was revived to host the dark ultra Faust, becoming an unknowing accomplice to the dark side. As the series progressed and Faust's battles with Ultraman Nexus grew more violent, Mizorogi began to erase her memories, slowly driving her insane with her unsealed memories of death. When Komon and Himeya found her, Riko was seemingly all gone and she transformed into Faust, Faust and Nexus erected their subspace fields but Komon was also pulled into their private battlefield. Using him as a sort of hostage Faust overpowered Nexus and began to drain his energy. Komon unable to accept what became of his beloved, shot at the dark giant while calling Riko's name reawakening her and vanquishing the giant. Mizorogi was obviously upset at the turn of events and summoned Nosferu to kill Komon. At the last minute Riko jumped over Komon, taking the blow to her back. The space beast was destroyed by Nexus but the damage was done. Komon found Riko's dying form, after telling him she loves him she dissipated into particles of Light. Later on Mizorogi would use her image as one of his illusions to torment Komon and to turn him to the darkside but the false spectre was driven away by the Komon's own light from his love and memories of Riko. At the end of the series when Komon/Ultraman Noa defeated Dark Zagi in the final episode, she appeared in Komon's memories congratulating him.

Ultraman Ginga
Riko Saida is set to return in the Ultraman Ginga movie special. She will appear to battle Ultraman Ginga as the Dummy Spark User of Dark Zagi. She rumored to be fighting over Noa's Spark Doll.

Trivia

 * Her actress, Shion Nakamaru also appeared in  Ultra Galaxy Mega Monster Battle: Never Ending Odyssey and  Ultraman Saga
 * Just like Julie, She's a female host for a male Ultra, she is the only one for an evil Ultra.
 * However, she is also the first female Ultra host not to be an extraterrestial born Ultra host.
 * She gave Komon a bird-like keychain that he uses as his amulet. The amulet would later be what saved him from Mizorogi's attempts to control him and breaking him out his depression.