Long

Long appeared in 2007 TV series called Juken Sentai Gekiranger. Long (ロン Ron), also known as the Mugenryu (無間龍 Mugenryū, Infinite Dragon), is the true main villain of Juken Sentai Gekiranger who engineered the events of the series behind the scenes until he reveals himself.

Being an immortal, Long has manipulated humanity behind the scenes out of whim for ages to ease his boring existence. Eventually, Long decided to create a Destroyer to make the world "less dull" by offering his services to Maku and to condition him while secretly aiding in the foundation of the RinJuken Aku Gata. But after the Kensei sealed Maku and the other Kenma, Long was forced to wait for another ideal pawn before he found a young Rio. Murdering the child's family, Long instilled a fear in Rio to become strong enough to escape the memory of that rainy night. To ensure no interference with Rio's progress, Long mortally wounded Dan years later so Rio can never have closure and then slaughtered Dan's kin while making it look like the village was decimated by a storm. Only Dan's wife and their son Jan survived, with Long personally killing the woman after she knocked her son into the river. Believing the child drowned, Long went back into hiding to watch Rio from afar using his Blood-Oath Ceremony (血盟の儀式 Ketsumei no Gishiki) obtain followers.

Eventually, once Maku is revived and forced Rio to serve him, Long revealed himself to Mele while assuring her that Rio will obtain Dorinki and defeat Maku, setting up the events for it. Furthermore, Long evoked Gou's transformations into the werewolf until Bae's interference stopped that. Long was further vexed to learn that Rio is making his way to Jūgenkyō, managing to have Rio turn back in the guises of Jan, Gou, and Sha-Fu, revealing the existence of Sozyuto that Rio needs to enter the village freely. Long also uses the same illusory power to force Mele to take the Sozyuto from Kenwhile he's defenseless. Once Rio and Mele make the run for the Jūgenkyō, Long revealed himself at last to Maku to hold his discarded pawn long enough for Rio to reach the village.

When the Kenma had served their purpose, Long arrives to kill Rageku in his fighting form which she recognized. With the deed done, Long fully reveals himself, offering Rio a chance to master the Genjuken style to become even stronger, converting both him and Mele in the Blood-Oath Ceremony to further his scheme. However, seeing Jan as a hindrance to his plans, Long attempts to kill him behind Rio's back. But ironically, Jan managed to awaken Rio as the Destroyer; much to Long's praise. Mele's interference ruined it, with Long's treachery and true identity revealed as a result, before beating Rio to find out why he didn't completely become the Destroyer. When Mele interferes once again, Long attempts to kill her, only to have Rio jump in front of her to shield her from the blast. Seeing Mele as the cause, Long takes her as a hostage so Rio can resume his part in the master plan. But once his plan is completely shattered, Long decides to kill them all and start finding a new Destroyer to replace Rio, however, Long is soon defeated by SaiDaiGekiRinTohja.

However, his spirit endured and entered Sanyo, using him to recreate himself. Now with a newfound interest in the Beast-Fist power that rivals his own, Long assumes his true form to personally destroy the world himself. Mele sacrifices herself to save the Gekirangers from one of his attacks, after which Gou and Ken try and fight with GekiTohjahWolf and SaiDaiOh, but Long effortlessly defeats them both. Rio attempts a suicidal attack to kill him but Long survived because of his immortality, though he was forced back into his armored form. Even in this state he still overwhelmed all five Gekirangers. Gou and Ken later fight him, along with the Kensei but they were no match for him. Long finally met his match when Jan, Retsu, and Ran returned after mastering the Rinjuken style. However, because Long was immortal the Gekirangers couldn't kill him, so they instead sealed him in a small ball using the Dōkokugan technique. Jan safeguards the small golden orb by wearing it as a necklace.

During the events of Go-onger vs. Gekiranger, Meka steals the sealed Long from Jan. Furthermore, when ingested by Nunchaku Banki, Long's energy turns the Barbaric Machine Beast into Long Banki (ロンバンキ Ron Banki). Despite being partially released, Long needed to defeat the Gekirangers to become completely free, and was ultimately sealed away again after SaiDaiGekiRinTohja and Engine-O G12 destroyed Long Banki.

When Jan Kandou met the Gokaigers, the ball-sealed Long was still seen around Jan's neck.

In Super Hero Taisen, a version of Long is a member of the Zangyack/Shocker Alliance. In the battle, he is spotted in many scenes. In the first scene he is spotted attacking Big One, in the second scene he is fighting GingaBlue, in the third scene he is fighting AbareRed and Riderman, in the fourth he is fighting TimePink, HurricaneBlue, DynaBlue and DynaYellow, and with the Gekirangers and Den-O's, he is kneed by GekiViolet and shot by Gun Den-O.

Another version of Long was part of an army of resurrected (mostly Super Sentai) monsters led by Space Raider after the revival of Madou Demon King Psycho. They proceeded to attack the gathering of Kamen Riders and Super Sentai, giving them a hard time. The heroes of recent years were in a pinch until the arrival of a force of Sentai and Rider reinforcements led by Akarenger and Kamen Rider Ichigo. The combined forces of superheroes were able to turn the tide against the Madou army. They lined up and used their various finisher attacks to destroy the revived monsters.

Powers and Abilities
Besides above powers, Long the Infernal Dragon also has these powers:
 * Absolute Immortality: He cannot be killed or destroyed by any methods. He himself claimed that he survived after destroying the world many times.
 * Possession: He can possess a dead body to unleash himself.