Jasper has mid-length white hair and a small black goatee. He wears a piece of rope tied around his neck and dark clothes.
Jasper is a calm and soft-spoken man. He is very loyal to the village and as such is tasked with guarding the village's priestess, Ruri. As with most villagers, Jasper is wary of Senku at first, but eventually comes to accept him as an integral part of the village.
Abilities and Skills
Jasper is almost as skilful at combat as Kokuyo, due to the fact he came in second place during the Grand Bout which made Kokuyo Village Chief. He doesn't appear to fight any more, as any subsequent battles than are shown do not include him.
He is first seen berating Kohaku for her apparent clumsiness with the water she needed to carry to Ruri. At the request of Ruri, he and his wife leave the two sisters alone to talk.
Jasper and his wife are next present at a hearing with what appears to be the village's leader, Kokuyo. They disclose that the person who brought the stranger to the village is in fact Kohaku, much to Kokuyo's frustraiton.
Jasper and Turquoise set preparations for the village's games. When his wife scolds him for not stopping Kohaku join the tournament again, Jasper says the rules are sacred and no rule says a woman can't participate, with the former saying that no one would think a woman would join the tournament to begin with and that's why there is no prohibition for women. Kokuyo says he is fine with Kohaku present, as he wouldn't allow a man who can't beat a woman rule the village. Jasper then informs Kokuyo that Senku has joined the games as well.
When Ruri collapses from her ailment, Kokuyo scolds Jasper for letting her walk while feeling sick.
Jasper acts as the match judge during the Village Games, deciding whether a rule has been broken during a match. During Kinro's fight with Magma, he rules that Suika throwing in her helmet to help Kinro is not against the rules.
Later, when Chrome uses the same helmet to beat Magma by lighting his shirt on fire, Jasper allows it, letting Chrome win the match. He inspects the helmet afterwards, with Chrome saying the helmet itself was already allowed while the rest is his own sweat and tears. Impressed, Jasper announces Chrome the winner of the bout. When Ginro wrongly deduces Ruri is willing to marry anyone that wins the village games, Jasper thinks to himself how unaware Ginro is; not even being able to read that Ruri's statement was just for the sake of formality. Eventually, Jasper has no choice but to declare Senku the ultimate victor of the competition as Chrome faints before the former has a chance to surrender.
He is surprised when Senku cured Ruri and watches the girl dash through the village.
When Homura set the village ablaze, a worried Jasper and Turquoise tried to tend to Ruri. However, they were told to forget her and protect the children. While doing so, the pair spotted Homura who cut off their path.
Jasper is present when Senku creates cotton candy and is amazed by the taste.
Once Senku finished recreating the record player is made, Jasper is amazed by hearing the recording of Senku's father and the song by Lillian Weinberg.
- His name comes from the opaque gemstone, which can either come in shades of red or green. This is consistent with all other members of Ishigami Village, who have names referencing metals and crystals.
|Male||Alabaster • Argo • Carbo • Chrome • Ganen • Genbu • Ginro • Hagane • Jasper • Kaseki • Kinro • Kokuyo • Magma • Mantle • Natri • Sagan • Sho • Soyuz • Tetsuken • Titan • Unmo|
|Female||Alumi • Azura • Beryl • Dia • En • Garnet • Kohaku • Kujaku • Namari • Ruby • Ruri • Sango • Sapphire • Shirogane • Shovel • Suika • Suzu • Turquoise|
|Unknown||Chalk • Sagara|
|Alabaster • Argo • Carbo • Chrome • Ganen • Genbu • Ginro • Hagane • Jasper • Kaseki • Kinro • Kokuyo • Magma • Mantle • Natri • Sagan • Sho • Tetsuken • Titan • Unmo|
|Alumi • Azura • Beryl • Dia • En • Garnet • Kohaku • Kujaku • Namari • Ruby • Ruri • Sango • Sapphire • Shirogane • Shovel • Suika • Suzu • Turquoise|
|Soyuz's father • Ibara • Matsukaze • Mozu • Oarashi • Soyuz|
|Amaryllis • Kirisame|