Ryo Ashihara

Ryo Ashihara (葦原 涼) is Kamen Rider Gills (仮面ライダーギルス), a character in Kamen Rider Agito.

Biography
He was formerly a star swimmer from Jyohoku University, but Ashihara's future as a swimmer came to an end after a near-fatal car accident. After the car accident, Ryo began to mysteriously undergo a metamorphosis. However, this came at cost of all those closest to him, leaving a signature of resignation to his swimming coach, who began to avoid him out of fear when he demanded to know the nature of leaving the University. Ryo turned to his former girlfriend Mayumi Kitahira for help after avoiding her for three months. But soon enough during the Snake Lords' attempt on Mayumi's life, Ryo underwent the partial evolution into an imperfect form of Agito. This forces him to stay away from Mayumi, who was frightened by his appearance to the point of moving out of town. But because he was an imperfect copy of Agito, Ryo's lack of a stabilizer made his transformation unstable, carrying with it detrimental effects on Ashihara’s body such as cellular decay.

The OverLord found Ryo, prolonging his life for a while longer. After attacking the OverLord out of fear, Ryo learns that his father's body had been found, believed to have died of a nervous breakdown. To learn the truth behind his changes and his father's suicide, Ryo sought answers from the other survivors of the Akatsuki, using his father's black book to find them, starting with Saeko Shinohara, protecting her from the Zebra Lords. During his attempts to kill the Lords, he fell in love with a survivor, Aki, who was killed by the Lords, though by the time Kamen Rider Agito arrived, Ryo came to believe that Agito was her murderer. But furthermore, many of the surviving Akatsuki members came to see Gills as the one out to kill them.

Ryo befriended a boy named Kazuki, whose parents were killed by the Sea Urchin Lord and wanted to evade the truth of what had happened. After seeing Ryo fight as Gills, the boy came to terms with the truth and had Ryo drop him at church to pay his final respects. But while attempting to meet another passenger of the Akatsuki named Masumi; Ryo was attacked by the psychic Sagara and left for dead. However, Ryo was founded by Tetsuya Sawaki, who asked the OverLord to resurrect him like in the past.

But when the OverLord refused, in fear of shortening his life more, Tetsuya attempted to have the newly-awakened Mana Kazaya resurrect him instead. Because of Mana, Ashihara discovered that his body chemistry was also altered; able to now accommodate his transformation. After fighting the Orca Lord, Ryo was found by Tetsuya, who reveals the Lords' fear and Ryo's genetic relation to Agito. Furthermore, he learned of Shouichi's identity as Agito and the truth behind Aki's death.

Eventually, Ryo was forced to fight Kaoru Kino, outmatched by the man's Agito form and forced to run upon being wounded. But Ryo is mysteriously suffering chest pain that would kill a normal person. Taken to the hospital, Kino attempted to use the operation as an excuse to finish the job. But at the last second, Kino lost control over his arm as Ryo awakened, escaping with Majima following. Majima was unable to save Ryo on his own until Tetsuya arrived, allowing him to transfer his Agito power to Ryo. As a result, Ryo obtains the ability to assume Exceed Form. He used his new power to defeat Kino, diving after him. It was that act that reminded Kino of his intent to save lives, leading to his eventual sacrifice.

After Kino's death and with the Lords nowhere to be found, Ryo befriended Risa Mishihara. However, he took her OverLord-induced death hard and attacked the El of Ground, only to be defeated and left for dead. However, Gills arrived to aid Agito and G3-X to finish their fight with the Lords for good. In the epilogue, Ryo left town and is wandering the world with a young puppy.

Kamen Rider Agito: Three Great Riders
Ashihara suddenly reappears out of a cupboard and immediately Makoto and Shouichi try to get him to win the title when talking about Gills' abilities. As a result, Ashihara gets the title but before they can laugh, an alarm goes off, the Unknown have finally arrived. The three Riders waste no time and rush out to stop them.

In the end, Telepi decides that there is no one Ultimate Rider and decides that they should all win. As he says this, the party hat appears over all three pictures of the Riders sitting on Telepi's table.

Kamen Rider Agito Special: A New Transformation
In this special Dr. Kunieda catches up to Shouichi and tells Shouichi that his son committed suicide a half year ago because he could not handle his slow transformation into Agito. Dr. Kunieda tells Shouichi to not lose hope and that "eventually the sky will be clear". Shouichi senses the Unknown and goes to fight with a new found confidence.

All four Riders fight against the Beetle Lord and despite their combined powers cannot defeat it. Agito, in Burning Form, looks up to see a clear blue sky, harnesses the power of the sun, and transcends to Shining Form. Agito, in Shining Form, single handedly defeats the Beetle Lord.

The story ends on a cliffhanger with a mysterious girl going into the G-trailer and stealing data on the G4 project, the events of this would be continued in the movie.

Kamen Rider Agito: Heaven's Door
Exceed Gills and Another Agito appeared to Hikawa's aid when he was attacked by an Agito and a dog-type Unknown but they were easily getting defeated. Luckily Agito/Shouichi Tsugami finally shown up. The real identity of this Agito was Shouichi Maguichi, who was crazed after being blamed for cheating on the programs for using a hidden camera during his childhood. Wanting to cure his sick mind he worshipped the Dog Orphnoch/Dog Lord and was told to feed on the despair of the public. After Agito and the others killed the Dog Lord/Orphnoch, Maguichi/Agito transformed into Mirage Agito out of rage. In a fight with Kamen Riders Agito and Gills, despite gaining the upper hand he was defeated by the strategized use of the Shining Caliber and a Shining Rider Kick. Maguichi was then arrested and was given an unspecified treatment.

OOO, Den-O, All Riders: Let's Go Kamen Riders

 * Kamen Rider Gills returns in OOO, Den-O, All Riders: Let's Go Kamen Riders.
 * Gills isn't shown alongside the secondary Riders when they stand in the cliff around the battlefield, due to his primary suit being damaged by water. However, when the Riders hop to their vehicles and fly towards the Great Leader, Gills is seen on his Gills Raider in the middle of the group, alongside the other Riders as Gills charges straight through the Great Leader's giant body.

Kamen Rider Agito & Kuuga Wild Battle
Gills appears with Agito and G3 in Kamen Rider Agito & Kuuga Wild Battle.

Kamen Rider Agito video game
Ryo appears as both Gills and Exceed Gills as a playabled character with Agito and G3 in the Kamen Rider Agito video game.

Kamen Rider: Seigi No Keifu
Gills appears with Agito as his aid in Kamen Rider: Seigi No Keifu.

All Rider Generation 2
Kamen Rider Gills appears in the All Kamen Rider: Rider Generation 2‏‎.

Kamen Rider Super Climax Heroes
Kamen Rider Gills appears in the video game with the others Kamen Riders in Kamen Rider Super Climax Heroes.

All Kamen Rider: Rider Revolution
Ryo Ashihara as Kamen Rider Gills, appeared as an unlockable character in this game. His Rider Finisher Ability is Gills Heel Claw.

Kamen Rider Battle Rush
Kamen Rider Gills in your form Gills Exceed appears as a playable and support character in the video game Kamen Rider Battle Rush using Exceed Heel Claw.

Kamen Rider Battle: Ganbarizing
Kamen Rider Kick Hopper is a playabled character in Kamen Rider Battle Ganbarizing..

Gaoranger Stage Show at Super Hero Osaka Dome
In a stage show where the Gaorangers are seen fighting their usual foes,, A Lord, and a Gurongi show up and wind up defeating them. The & Kamen Riders Kuuga, Agito, G3-X, Exceed Gills & 1 arrive to assist the Gaorangers.

Equipment

 * Meta Factor: Transformation belt
 * Gills Raider: Ryo's personal motorcycle, which transforms along with him due to the power of the Meta Factor.

Ridewatch
Gills Ridewatch (ギルスライドウォッチ): Based on Kamen Rider Gills, this Ridewatch would provide access to the GillsArmor. It is dated 2001.

Portrayal
Ryo Ashihara is portrayed by Yūsuke Tomoi (友井 雄亮).

As Kamen Rider Gills, his suit actor was Yoshifumi Oshikawa (押川 善文).