Mugensai Hinata
He is their sensei who becomes a hamster and is stuck that way because he claims he has forgotten a word in the spell to turn him back. In the first episode, he turned himself into a Owl.

In episode 32, Mugensai is with Ikkou in the hospital. A doctor is there and he holds Mugensai in his hands and talks with him. he knows the hamster is a person. In the movie, Princess Raiina kissed the hamster and he became human but as soon as she left the planet, he was a hamster again. In episode 50, he was returned to normal state.

Oboro Hinata
Oboro working on the Shinobi Machines. She observes everything from her computer in a secret lab in a cave. In Episode 3, Mugensai sends a robot in a black ninja outfit to earse people's memories of the Hurricanger saving them, securing the Hurricanger's indentities and futures. In other words, they can't do anything else but be Hurricangers and of course, no one else must know.

She rebelled against her father in Episode 12 demanding a day off and shot him off inside a ball capsule in a tube. He landed with a sad little girl missing her parents. He then understood he never considered his daughter's feelings.

In episode 39, Oboro finally asks for explainations from her father. Explainations to things she displays on a slideshow: Karakuri system coming from the stars, the Tricondor, the message that came about meteors coming to Earth, the Ninja Misen, the Revolver Mammoth and more importantly, the elusive Shurikenger himself. Gozen happen to call Mudensai and Oboru happened to answer the phone. She ended up folowing Gozen's advice on a spray and it backfired. Oboru felt foolish for following Gozen.

Hase is the employer of Nanami. He is rather funny. He wants to make her a star, but she keeps taking off when he's trying to promote her with Compact Discs and posters.

Kanae is Yousuke's hard as nails odd job employer. She first appeared in Episode 2. Appeared again in Episode 13.

Naruko "Meiko" Bito
After losing the parents in the accident, Kouta and his little sister Naruko were raised at an orphanage. They worked at the same kid center, but it came to the point that she wanted to leave Japan to help in Africa. Kouta was not exicted about her leaving but she then reminded him about him risking his life as a Hurricanger. She returned home in Episode 41 to renew her visa. She saw the Goraijer de-transform and she was star-strucked with the ninjas. She played with their Gourai Changers that rattled them. Kouta continued to hide his identity from her. She knew he went to a ninja school but didn't know he was Hurricanger.
She put pieces together and found out Yellow was Kouta. But as soon as she tried to have him answer, Shurikenger came along in the guise of Kouta. A Jakanja was going to attack her so Yellow blocked the attack. She soon found out that he was doing that to protect her. Shurikenger as Kouta offered to take her to safety. She was most concerned in the real Kouta's safety, that he might put his life in danger. At the airport, they say their fond goodbyes but to realize she knew the truth. She said, ""Don't give up, Hurricanger! And give my regards to the pretend-you!" One of Oboro's hypnotizing robots popped up behind Nanami and Yousuke, they held it down from erasing her memory. She left with the knowledge and Kouta was gratified.

Ikki Kasumi
Ikki Kasumi is the father of Ikkou and Isshuu, the Goraijers. He was the strongest thunder style ninja of Ikazuchi Way. He attacked Eygpt and has done much destruction. He forced his sons to fight each other. He is believed to be dead. He left a message to them on a device the Goraijers had to get three crystals to get. Ikki saw meteors falling in Eygpt and they are similar to the meteors that fall in Episode 31 due to the Fangurlu, the Space Wolves. In Episode 38, it was discovered that the Kirai Maru was Ikki's weapon and that cursed it to hurt loved ones. He believed that hate gave strength and he imposed this on poor Isshuu.

The schools got their technology from the spear stone and her, which is why Ikazuchi had a Karakuri system compatible with the one Oboro designed for the Hurricanger. She has been alive for the past five hundred years. She was the keeper of the mysterious spear stone (the other medal, the spear going with the Raging Arrow). It was in her forehead and was considered her third eye. Her father decided his daughter made a good place to hide it. She was first mentioned in episode 39. Shurikenger gets a call from her while he ate gyoza. He then walks in blinding white light to Gozen who is in a box of curtains. It has two dividers in each side. They are yellow-tinted and have green ropes and green top edges. Inside, Gozen floats in a lotus position. He is spoken to but we don't hear it, he is told that the stars are going out. In the wars between ninja clans, her entire family was slaughtered and she ran off to safety to protect the stone.

A spray was developed by Oboro to take away the gold dust, it was helped by Gozen. Gozen happen to call Mugensai and Oboro happened to answer the phone. But Gozen told Shurikenger not to use the spray. The spray was faulty, it caused the rangers to freeze. Shurikenger told the others he was up to something but he said, "I don't know". The Goraijer asked if the info was from Gozen and he said "Yes." He offered to take them to her in the Tempujin. He took them to an island. They appear in a black background to the curtain box where she was. They rolled up the curtain to find a cute big teddy bear. They felt like fools until Shurikenger found a scroll with a message.

In ep 43, Mugensai the guniea pig talked to Gozen who had a modified male voice. She made her first physical apperance in episode 44. Gozen is so shocked that she comes out of her hiding to help. Gozen appears in a bright light to help them. After the defeat of Badogi, she comes down. Sandaru threatens her and she fights him with energy and Hurricane Red intervenes bringing down Sandaru. She had come out now to bring the power of the medal to protect the world and defeat the Jakanja. Sandaru was after her because she has a jewel.

In episode 47, we learn that her father had a tree planted being the only thing left from her childhood. By the time of now, the tree was very tall. Sadly the Jakanja burned down the tree once she entered the battle with our heroes. The stone kept her alive so doesn't have any need to eat. Shurikenger was her bodyguard. Gozen and the spear stone was a core for both Ikazuchi and Hayate Way schools. Mugensai did not know whom she was or that she was a woman because she hid her identity so well. She died after Sandaru used the spear stone's sibling stone to pull it from her head. The power sustaining her ran out and she vanished from the Hurricanger's arms.

Raiina Hime
The princess of Asutoramu fourth planet in Hurricanger: Shushutto the movie. She was kidnapped by two monkeys Hizaaru and Burizaaru who took control of the Tricondor. Yousuke was her knight in shining armor. Raina controled the Tricondor with a special pendent. The ninjas defeated the Uchu Shinobi Zaru and Raina was able to return home in her Tricondor with her buddy Nakkuru, a star-shaped robot.

In 'Hurricanger vs Gaoranger,' the Gaoranger were kidnapped by Tsuetsue and Yabaiba and the Jakanja took their G-Phones and disguised as them against the Hurricanger and Goraijer. Sae escaped and met with them telling them the truth. The Gaoranger escaped and teamed up with the ninjas to defeat Chuzubo's brother Chubozu. The Power Animals combined with the Shinobi Machines. They then returned their G-Phones to Tetomu once again and they went their seperate ways. Soutarou left Shurikenger during battle.