|Fur Color||Lemon yellow (fur)|
|Partner||Masago Kuroda (JPS)|
|Magical Item||Magical Key|
Jasper is a naturally colored cheetah with sharp claws and red Jewel Eyes. His fur is yellow, with brown spots and ears. His ears are decorated with diamond-shaped jaspers similar to earrings. He wears a collar with a diamond-shaped jasper and a ring attached to a similar jewel on his tail.
Occasionally, he can be seen wielding a large key.
In Jewelpet Kira Deco!, he wears a cowboy outfit, made up of a stetson and a white sleeveless jacket.
Jasper's charm is a yellow octagon shape. It is decorated with a round jasper with a small star embedded in the center and four diamond shapes around it. It has a silver lining resembling a key. The lining near the borders is pure gold.
In Jewelpet Sunshine, he at first seems charming to the female characters but he is actually childish and lazy. He can't be bothered to clean up, always leaving his room in a mess. His favorite food is curry, but he gets furious if people add unnecessary ingredients to it. He appears to be less rude and lazy in the other seasons.
Aside from his regular magic skills, Jasper is the only Jewelpet capable of opening transdimensional gates in all seasons, using his Jewel Key, which is accessed from the gem on his tail. Because of this, he can easily connect the human world and Jewel Land.
He first appears in the end segments during the Grand Prix Arc of Jewelpet Twinkle before formally debuting in episode 50 of the series.
In Jewelpet Sunshine, he first plays a major role in episode 8, in which he had to temporarily stay in Mikage's dorm. The two of them are bitter towards each other because Jasper made a mess of Mikage's room, and because Mikage adds extra ingredients to Jasper's perfect idea of curry. Jasper appears in the following episode to open the gate to the human world.
In Jewelpet Happiness, Jasper appears in episode 19 as a hard-working and determined mechanic who tries to fix Jewelpet Cafe's air conditioner.
In Lady Jewelpet, he is a fortune teller in episode 40. He can predict the future by inserting his key into an app on his JewelPad. He helps Momona and Cayenne safely make their way to a tower to watch the sunrise.
- Jasper's jewel motif is the jasper, a variant of the mineral chalcedony.
- Jasper's design is based on a fan design submitted to the Jewelpet Designing Contest that was being held during the airing of Twinkle. The fan received special merchandise from Sanrio.
- Jasper's shares his birthday with Prase and another Sanrio character, Roseanne of Wish me mell.
- Jasper is the only Jewelpet in the series with a characteristic item (his key).
|Magical Red||Ruby • Garnet • Rin • Ryl • Kohaku • Titana • Sango • Nix • Alex • Brownie • Jasper • Lolip • Rosa|
|Magical Blue||Sapphie • Luna • Yuku • Aqua • Kaiya • Opal • Amelie • Lapis • Io • Topaz • Charotte • Larimar|
|Magical Green||Peridot • Chite • Prase • Rald • Flora • Tour • Milky • Nephrite • Tata • Kris • Angela|
|Magical Black||Diana • King • Dian • Labra • Coal • Granite • Luea|