Jimmy is one of Jade's friends, who, in a possible future, grow up to be Torhu's apprentice but also became the infamous dark chi wizard Iso.
Biography
Jimmy was treated like a "freakoid" at school. After he couldn't get his bag out of tree, Jade helped him and decided to bring him to crowd where he would fit in: her family, who were busy trying to locate the other half of the Chi Arcanum.
Years later, Jimmy grew up to be Tohru's apprentice. But seduced by dark chi, he took on an alter ego of Iso, becoming number one on Section 13's most wanted list. Using a time portal spell, he traveled to the past, to a few minutes after Jade introduced him and snatched the current half of the Arcanum. But past Jade followed him and with her future self, found Iso's lair and took the half back. After destroying the shopping mall where his lair was located, Jade was fired. But in his Jimmy persona, he tricked the two Jades into getting the other half of the Arcanum on Eagle's Peak, which he combines, revealing himself as Iso. He didn't blame Tohru for not noticing, merely Jade for introducing them. Enhanced by the Arcanum, Iso conjured up an army of Iso to take down the Chans. But past Jade went back to the present to get his past self to help. Past Jimmy confessed he was afraid of heights. With the help of the Rooster Talisman, past Jade lifts Iso into the air, frightening him. When he was arrested, past Jimmy said he'd would refuse to become evil. He and Jade took the Arcanum into the past to be destroyed.