Lacey Sheridan is Maya's best friend. She is a spunky, stylish teenager who takes an instant liking to Kit, as she thinks he's cute and approves of Maya trying to get with him. She is also stubborn and for the most part only humors Maya's endeavors to find out more about the Kamen Riders. However, as time progressed, Lacey has gotten annoyed at Maya's fixation on the Rider War and makes futile attempts to draw Maya's attention away. Lacey finally believes Maya when she witnesses Kit, Len, Chris and Danny enter Ventara, followed by the transformation of Albert into Kamen Rider Spear. At first she walks away in disbelief but is later seen showing regret for not believing Maya. She is then tricked by Michelle Walsh into stealing Maya's research on the Kamen Riders thinking its for her own good. When she realizes what she did was wrong, she confesses that she stole Maya's research. Maya is at first furious with Lacey, but later forgives her and gets her help in sneaking away from the bookstore to find Kit. Later Lacey, Maya, and Trent are captured by the No-men, and they all find Len after his battle with Wrath. Lacey, knowing that she wouldn't be any help, left Maya and Trent promising Michelle not to tell anyone of the events that has taken place. During the Epilogue, she now works in the bookstore which, thanks to Lacey's influence, now has a clothing section. Lacey also follows Maya to her book signings.
Agent Trent Moseley
Trent Moseley is a young teenager who works with Maya Grace's book store. He has known Kit since he was in high school and does not trust him due to his past as a thief. His behavior around Maya seems to hint that he may have a crush on her, which only furthers his dislike of Kit, whom Trent believes has caught Maya's interest romantically though his animosity towards Kit has slowly decreased. He is also an admirer of JTC. After witnessing the transformation of Kamen Rider Spear, he fully believes that the Kamen Riders exist. Upon learning from Maya that JTC is in fact Kamen Rider Strike, he becomes very disappointed that the person he looked up to turned out to be "a loser" in his own words. When Kit is captured by the No-Men, Trent and two of his geek friends hack into their database in order to find Kit's location. He relays the information to Maya, Len and Kase. He is later captured by the No-Men, along with Lacey and Maya. Trent is later brought into the No-Men where he learns that JTC was offered to work with them or go to jail. Trent ended up taking up the offer to work with them and work out the scanners to detect the teleportation beacons and assist Len, Maya and Eubulon. When Chance, Price and Hunt come back from the Advent Void, Trent is initially uneasy around them due to his experience with JTC, Price's twin, and Danny, Hunt's twin, however he warms up to them once he found out they were geeks like him. Together they discovered the remaining transmitters. During the final battle, he sneaks into Xaviax's base, along with Maya, who manages to set up a mirror for the other Riders to go into. He later witnesses the 13 Kamen Riders use their Link Vents and destroy Xaviax. During the Epilogue, Trent is still working full-time with the No-Men becoming somewhat of a liason between Ventara and Earth. He also accompanies Maya to her book signings.
Michelle Walsh is a reporter working under Maya's online editor who is intent to uncover the truth, yet is too arrogant to realize what is really happening in the city. When Maya tries to flush out the recent Kamen Rider, Michelle took photos that stated that Maya faked a monster abduction resulting in Maya getting fired by the site's online editor. Since Maya's termination, Michelle secretly shadows her to find out what Maya truly knows about the mysterious abductions. However, Michelle is revealed as a member of a government agency called the "No-Men" sent to uncover the mysteries of the abductions. After learning about the Kamen Riders, she is instructed by Agent Phillips to go after Kit and capture him. She attempts to question Kit and learn more about Ventara but Kit manages to escape. After that, she heads out in pursuit of the Riders as well as Maya, Trent and Lacey. A short time later, following a long battle with only Len remaining in the aftermath, she shows up with a mysterious letter, giving Len hope that they can win the war against Xaviax. She takes Len, Maya, Trent and Lacey to Eubulon and is now locating Xaviax's teleportation devices. She eventually talks to Maya and Trent about her past actions saying that she was putting her job above all else and makes amends to their relationship. During the epilogue, she continues to work for the No-Men but is trying to be a little more patient.
Agent Phillips is the head of the "No-Men" and Michelle Walsh's superior. When he received the info from Michelle about the Kamen Riders, Xaviax, and the Mirror Monsters, he instructed Michelle to head up a mission to apprehend Kit Taylor. They succeeded and Agent Phillips arranged for a "demonstration" by having the door to Kit's cell opened to lead him to a Mirror Monster. Following the venting of Kit Taylor at the hands of Kamen Rider Wrath, Agent Phillips led Len, Maya, Lacey, and Trent to where Eubulon was held. Agent Phillips offered Trent an opportunity to work for them or go to jail, the same offer he previously gave to JTC, though unlike Trent, JTC chose jailtime. He is currently assisting the Kamen Riders using the No-Men's headquarters as the temporary base for Eubulon's Kamen Riders.
Frank Taylor is the father of Kit Taylor who disappeared when he was 17. He has appeared to Kit in visions. Maya and Trent found him in the hospital in a catatonic state. He is later kidnapped by JTC and Xaviax, who use him to blackmail Kit. After rescuing him, Kit's latest vision from him tells him that he doesn't have much time left and Kit must make a decision soon. Frank is briefly awakened to talk to his son by Xaviax, attempting to bring Kit onto his side, but returns to his catatonic state moments later. After the final battle, Eubulon was able to revive Frank Taylor. It appears that Frank finds out about Kit's adventures and appears to fully support his discision to continue fighting and protecting everyone as a Kamen Rider.
Sarah is a Ventaran girl who Adam falls in love with while on duty. She is unaware about the circumstances surrounding Ventara as she is held in an illusion created by Xaviax. She awakens when Xaviax is defeated and Adam reveals what happened to Ventara, but it appears that she forgives him.