They live in a mystical place called Jewel Land, attending a school to learn more about magic and each of them were paired with their own human partners.
In Kira Deco, he is a Jewelpet who is a master of a martial arts skill called "The Way of the Tail", but is actually a scammer that sucks his student's life forces out of their bodies.
In Kira Deco, he is shown to be the sheriff of Jewel Town who helped Midori to arrest Tata, and Retsu delivers the final blow.
In Happiness, Jasper works as a repairman in Jewel Land, fixing the broken air conditioner that is gone berserk due to a magic mishap.
Prase gets a more prominent role in Jewelpet Happiness, who studied Theatrical Arts in France, speaks with a French accent and is well known for producing plays.
He later reappears in Jewelpet Twinkle along with Peridot in the human world, searching for a "Sparkling Round Thingy" to make his wish come true and find his partner.
Rald once again appeared in Happiness, which like his other counterparts, can't talk fluently except in the episode's end sequence.
In Happiness, Peridot works as a fortune teller in Jewel Land and also Ayame's babysitter, who yearns to get a Magic Gem.
In Magical Change, she is an employee at a sushi shop and is one of the few Jewelpets to achieve their human form; in this case, Peridot has lime green hair, the same color as her ears.
In Kira Deco, she is a wandering sweet potato dealer who is preventing the destruction of Jewel Land through special offerings.
In Happiness, Milky is Draggy's foster mother, who found his egg years ago and raised him as her own child.
He also has a cameo appearance in Happiness, before having a major role in episode 40, being a victim of the Red Moon which enlarges him to massive proportions.
In Happiness, Luna works as Jewel Land's mail carrier, who is worried on her job due to summer fatigue.
She protects the Fountain Dragon from Alma's attack at the cost of her own life in episode 26, turning into her Jewel Charm form.
In Magical Change, she is a strict coach-like leader who commands all of the Jewelpets to find ways to restore the Jewel Castle back to its normal state.
In Happiness, Lapis appeared alongside Tata and Chite as they try to ruin the Halloween party due to the Red Moon's influence.
He also makes an appearance in episode 39 where his house was destroyed by a "Boom Rock" that Ruby tossed, declaring Angela guilty until Labra attempts to prove her innocence.
In Kira Deco, Dian is one of the members of the Decoranian's Four Heavenly Kings (四天王, Shiten'nō), the most highest ranking agents employed by the Dark General.
In Jewelpet Twinkle, Labra is a young prankster and loves making jokes in Jewel Land, especially to Ruby, but sometimes gets scared and cries a lot, which can cause powerful magical shock-waves that can destroy anything nearby, even statues.
She is also seen living in Akari's house in the human world along with Ruby and sometimes doesn't want to be called a dog due to her species.
Granite gets a major episode role in Magical Change, where he gets struck by poisonous plants which makes him have a split personality between his normal, mild self and a suave romantic man.
But after each failure and relevance that he's not his father, he leaves Jewel Town only returning when he then saw his friends getting abused by the Dark General in his evil form and had no choice but to help them.
He resumes to the form of Coarumi one more time to help the students and then revealed his true identity to his friends, sacrificing himself to stop the Dark General, which results to him dying.
Coal himself wields a black Jewel Pod (later a cardboard one after being demoted), used to contact his master back at the Human World while casting dark magic clouds to his enemies.
He then had his formal appearance in episode 37, on where he found Yumiko's doll Dorothy in the playground and took it, not knowing it was corrupted by the Red Moon's Magic.
In the later parts of the series, it's revealed that she has a mysterious past after Lillian found the Music Box during one of the Lady Exams, with her human partner crucially linked to it.
It's later revealed that she was Lady Diana's Mentor, and she left her due that she loved Alto, leading her to bring the doll she has to life into Lillian.
First debuting in the end of 2011, Sweetspets (スウィーツペット, Suwītsupetto) are a distant relative to the Jewelpets which are animals based entirely on desserts.
In Kira Deco, Sakuran is a tourist Sweetspet who visits Jewel Town for the annual Tanabata festival, though she has a problem with her crystallizing body.
Nachi revealed to only be manipulating her for taking her role as the class representative, breaking Charotte's heart and making her anti-social until changing back after meeting Shouko for the first time.