Rebels
Disclaimer: I own neither Avatar nor Green Day.
Story: I think Saint Jimmy and Jet are pretty similar. All of this is based on my interpretation of Jimmy, so don't take it for cannon. Most of the details on him are just inferences drawn from the songs.
Jet was prowling through the treetops when he noticed the figure slouched against a tree, asleep. It surprised him. Anyone who walked through here anymore was either very confident, or tired of living. He dropped down next to the enigma.
It was almost like looking in a mirror, albeit a distorted and disturbing one. The traveler was startlingly pale, so much so Jet wondered if he was ill. He had scars all over his arms, and appeared to be dreaming and talking in his sleep. Jet crept closer to hear what he was saying.
"Rage and love," he muttered. Jet jumped with surprise and froze as not to wake him. He didn't stir. Jet moved closer.
"Hey," Jet said. No reaction. "Hey!" he said louder. Nothing. He lightly jostled the sleeper with the blunt end of his hook-sword. The traveler's eyes flew open.
"Is it October yet?" he asked blearily.
"No," Jet answered honestly, thrown by the question.
"Then why did you wake me up?" Jet ignored him.
"What's your name?" Jet demanded.
He gave it some thought. "Saint Jimmy," he answered. "What's your's?"
"Jet," he said tersely. "How did you get here?"
Jimmy gave him a crooked smile. "The usual method. It wears off; I'll be back in reality before long."
He was obviously out of it. Jet decided it would be unwise to aggravate him. He wasn't Fire Nation, that was clear. "What do you do?"
Jimmy laughed. "What do I do? I'm Saint Jimmy, man. Split personality extraordinaire, teenage assassin, rebel, comedy and tragedy, and insubordinate leader of the Lost and Found."
Jet said nothing.
"You got a problem with it?" he asked threateningly.
"Not at all, friend. I was just thinking that you remind me of myself," Jet said easily.
Saint Jimmy looked impressed. "Really? That's... interesting."
"Want to meet the freedom fighters?" Jet asked causally. Jimmy raised an eyebrow.
"Of course. Lead the way."