Nico Saiba

Nico Saiba (西馬 ニコ) is a professional gamer and supporting character in Kamen Rider Ex-Aid. Originally approaching Taiga Hanaya for her vendetta against "Genius Gamer M", Nico eventually becomes Taiga's assistant in handling the Bugster crisis.

She later became Ride-Player Nico (ライドプレイヤーニコ) during the Kamen Rider Chronicle crisis.

Early Life
Nico was already a skilled gamer by the age of 12, going by the alias of "N". During a gaming tournament in 2010, Nico was observing Genius Gamer M winning against another gamer. She later made it to the final round playing against M but lost, attaining second place in the tournament. Though M was impressed by her gaming skill and hoped to play against her again sometime in the future, Nico was dissatisfied and developed a grudge against M.

Nico would later go on to win numerous game tournaments as "N", earning a huge amount of income. As her only loss in gaming was her loss to M, she vowed to avenge this, waiting for a chance where she could defeat M once and for all.

Meeting Taiga
Nico first appears in Taiga's clinic, asking if he could defeat M for her and introduces herself before Taiga leaves.

She visits Taiga again during his internet investigations into Kuroto Dan and Genm Corp. Nico fakes Game Illness in order for Taiga to pay attention to her, but she shows gratitude for him actually checking her anyway despite his annoyance of her lying. She reveals she knows of Taiga from stories on the internet including eyewitness reports. Nico once again asks for Taiga to defeat M and she seems puzzled as to why he has Genm Corp. games for use as medical equipment, but Taiga tells her not to touch his Gashats and forces her to leave.

Attempting to Transform into a Kamen Rider
Nico eventually pushed Taiga too far by attempting to move into his hospital, after which he told her never to return before storming off. In an effort to take matters into her own hands, she stole Taiga's Gamer Driver and the Bang Bang Shooting Gashat, and faked a call to CR. When Emu and Asuna arrived, Nico attacked Emu and attempted to transform. However, without the compatibility surgery, she instead awakened the dormant Bugster Virus inside of her. After Revol emerged from her and escaped, Nico was brought to CR.

Due to her grudge against M, she refused treatment and openly antagonized him. Eventually Taiga came to retrieve her from CR.

Kuroto told Emu the reason behind Emu becoming Ex-Aid without the need of a compatibility surgery, his recent headaches after transforming, and his ability to create Gashats. Nico attempted to stop Kuroto from revealing the reason behind all this, but it was too late, as Kuroto revealed the reason despite the objections against it: Emu was the first patient in the world to be infected with the Bugster virus.

Nico was one of the witnesses of Emu's Game Illness breaking out, and upon returning to Taiga's clinic, she stated that if she lost to "Genius Gamer M", she didn't actually lose to M himself, but rather the Bugster inside him.

After Kuroto's death at the hands of Parado, Nico was relieve that Kuroto is no longer a threat anymore, but Taiga replies even after Kuroto is gone now, the remaining Bugsters like Parado are still on the loose, as the battle still continues to stop Kamen Rider Chronicle Gashat from being produced completely.

Nico got a shocking info about sudden mass-production of Kamen Rider Chronicle Gashats and show it to Taiga. Becoming suspicious of this "new" Genm Corp. marketing, she and Taiga goes to the company to find the new CEO Ren Amagasaki, and Hiiro also goes there for the same thing on this suspicion.

Becoming Ride-Player Nico
Tantalized by the prospect of becoming a hero gamer, Nico found a copy of Kamen Rider Chronicle and became a Ride Player. Christening herself as "Ride-Player Nico", Nico's skills as a gamer allowed her to beat the Revol Bugster, becoming the first Ride-Player to defeat a Bugster. As a reward, Nico was granted the Gashatrophy of Bang Bang Shooting, which Poppy explained was proof of her victory and that through collecting all of them, she would be eligible to face the final boss.

In order for the Kamen Riders to "clear" Kamen Rider Chronicle, Nico acts as a front-out for the Riders as a Ride-Player. As so, she has defeated most of the Bugsters and collected most of the Gashatrophies for the Riders.

Tracking the Motors Bugster with CR, Nico and Poppy engaged him, rescuing an imperiled Ride-Player only for the Bugster to quickly escape them. However, Nico would later discover that Vernier and Gatton had appeared, proceeding to claim the Gashatrophies of Jet Combat and Gekitotsu Robots with Taiga.

Intercepting the Charlie Bugster, Nico claimed the Gashatrophy of Shakariki Sports by beating him with the Nico Critical Punch. With Taiga, Nico would discover that the Bakusou Bike Gashatrophy had been recovered by Hiiro. That, combined with the DoReMiFa Beat Gashatrophy having been gifted to Emu by Kuroto Dan as thanks for saving Poppy, meant that only the high tier of Bugsters within Kamen Rider Chronicle remained.

Though Nico was eager to face the remaining Bugsters, Taiga cautioned her to only step in to perform the finishing blow as the top tier Bugsters were too dangerous for Ride-Players to engage. Through information disclosed by Kuroto Dan at CR, Nico learned of the final boss, Gamedeus, whose only counter was the form of the legendary Kamen Rider Cronus, which itself could only be accessed by harboring all strains of the Bugster Virus. Standing by with Asuna during the Kamen Riders' showdown against the Bugsters, Nico saw that Lovelica had been left open for her to take down and prepared to step in only for the battle to be interrupted by Masamune Dan, first CEO of Genm Corp. and father of Kuroto Dan. Revealing that Kamen Rider Chronicle was his masterplan all along, the elder Dan, having long since implanted and pacified all Bugster virus strains within his body, assumed the form of Kamen Rider Cronus himself, proceeding to terminate Lovelica permanently while defeating all parties.

As the Kamen Rider doctors desperately fought to oppose the rampaging plague of Super Gamedeus, Nico helped the remaining civilians to get to safety while discovering, to her horror, that Riku Suzuki and his mother were among the rampaging Bugster Virus carriers. Fortunately, however, the horde was cured by Poppy as she sacrificed her own existence to neutralize Super Gamedeus's virus through Doctor Mighty XX. In her last words, Poppy told Nico to look after Taiga and Taiga to be nicer to Nico. After Masamune Dan was finally defeated, Nico returned to finish school while leaving behind her Bang Bang Shooting pin in Taiga's clinic. Reuniting with her friends at school, Nico revealed that she had used all of her pro gamer winnings to invest in Genm Corp.'s stocks. Becoming the majority share holder, Nico appointed Ju Ju Burger developer Tsukuru Koboshi as the new CEO of Genm Corp. Soon after, Nico graduated and returned to Taiga's clinic, volunteering to become his assistant in treating the Game Disease.

Personality
Nico has a tomboyish yet bubbly personality, but is immature and incredibly childish. Competitive to a fault, she had a vendetta against Emu simply because he beat her in a gaming tournament. She has shown herself to be bossy and manipulative: completely redecorating a room in Taiga's hospital and CR during her stay (done in both instances without permission), and faking a Game Illness outbreak in an attempt to defeat Emu (ironically, this attempt actually triggered an outbreak). Her bark is much worse than her bite: she often boasts and makes claims that can't be backed up, particularly in regards to the other Riders.

Despite her somewhat unlikable demeanor, Nico is not completely self-absorbed: she helped civilians escape during Genm's attack on Genm Corp. Nico has also shown to act somewhat as a moral compass for Taiga, occasionally asking him questions about his true intentions that break through his tough demeanor. Later on, after defeating Lovelica, she even helped him locate the Bugsters they needed to beat to clear Kamen Rider Chronicle, even if they both have their own reasons for playing.

Nico is also shown to have somewhat of a sincere side. After learning that the person she lost to six years ago was not really Emu but in reality Parado who was possessing Emu, she feels apologetic towards Emu for the unnecessary trouble, and now resolves to settle things with Parado instead.

Eventually, while Nico was infected with Gamedeus' virus, she also decides to let go of her childish demeanor and realizes that she didn't want to just beat Emu or Parado for losing to them, but that she wanted to beat someone strong instead.

Powers and Abilities

 * Genius Gamer: Nico is a professional gamer who goes by the alias "N", a reference to the genius gamer M. Her skills are such that she was able to be the runner-up in a gaming tournament at the age of only 12. According to Taiga, she makes around ¥100 million a year in winnings. This is also shown as she becomes a Ride Player, beating Revol easily with a coordinated use of Energy items and her skills.

Devices

 * An unknown silver colored version of Para-DX Buckle

Arsenal

 * Gashacon Magnum - temporary weapon borrowed from Taiga Hanaya/Kamen Rider Snipe

Portrayal
Nico Saiba is portrayed by Reina Kurosaki (黒崎 レイナ) and by Noa Miyano (宮野 叶愛) as a child. As Ride-Player Nico, her suit actor is Satoshi Fujita (藤田 慧).