Uproar is a fictional mutant character created by Marvel Comics for their Marvel 2099 run X-Men 2099 but later migrated into the pages of X-Nation 2099. This short-lived series only lasted six issues before being terminated.
Little else is known about the boy before he arrived at Halo City, but he soon became a part of the teen group X-Nation. They come to live in Xaiver's Home for Indigent Children, which is run by the Sisterhood of the Howling Commandos. Cerebra, of the X-Men assists in teaching classes.
Uproar and the others would enjoy spending time at a 'milk bar', where dairy products are altered to produce narcotic qualities.
It was some time later that Avian decided to mount a mission to recapture Willow in a bid to be the first to find the messiah for himself. He attacks the children and succeeds in capturing Willow again. Wanting to rescue their friend, X-Nation decides to infiltrate the Million Palms facility and save her. However, their fledgling efforts ended in their capture and subsequent intense roture. They were able to escape when Willow impersonates the Avian. Upon their return home they found that Halo City was devastated.
Their home had been blown up by an Atlantean attack force. Most of the Atlanteans die and the head sister, Bridge, survives long enough to say goodbye. Halo City, along with most of the inhabitable world, is being slowly flooded by Phalanx forces. To add insult to injury, Exodus had awoken from another century-long slumber and tries to make X-Nation his Acolytes. They refused and were subsequently beaten along with the Wild Boys who had sought out Wulff for revenge. After they were revived, Exodus continued to try and sway their opinion to his side, but some implicitly didn't trust Exodus. The rest of the group joined in that opinion when Exodus refused to save the human population of Halo City and they refused to be in service to him. After Clarion sacrificed himself in the battle with Exodus, the rest of the kids were teleported away by Mademoiselle Strange to face their uncertain futures.
Willow also realizes Uproar is missing and presumably mounts a rescue mission.