O3
"Trying to be subtle while leaning against objects to stay upright"
Tony didn't want to bring Peter into Avengers-level fights so young, but he'd long run out of options. Government officials showed no signs of letting up, and even if they did, he hadn't forgiven the rogue members yet, not enough to just pretend nothing was wrong and trust them in a team-up. There were only so many superpowered individuals left who hadn't hidden their abilities after news of the Accords had spread. It wasn't long before they were called in under duress and he hurriedly asked the kid to temporarily join the remains of the team. He should've expected the youthful eagerness, but somehow he hadn't anticipated being cut off with a, "Yes, yes, YES!" before he even got through the request.
They made their separate ways to the block where the problem was tenuously contained by panicked looking police officers. He paid enough attention to notice that the creatures looked roughly half-humanoid, half-lizard, and all angry as he arrived, but he didn't care beyond that. In the few minutes he'd spent hanging back from the fight, FRIDAY had observed their initial attacks and defenses and highlighted their most obvious weak points in the head-up display. He passed on the information to the Spider-Man suit and Vision's more complicated interface with FRIDAY before he repeated it over the voice comms for Natasha's sake. He flew in closer to the action, and less than twenty minutes later, there were no living aliens to be found. It was by far one of their easiest battles, especially considering how small the team had become. He supposed they hadn't needed the kid today in the first place, but a little battle training couldn't hurt him if he had serious plans for joining the team as an adult.
Natasha and Vision, used to the post-battle debriefing process, had left for the tower once they'd confirmed that their work was done. Spider-Boy hadn't done this before, so Tony figured it was on him to show him the ropes. He'd catch on fast enough; he was unquestionably smart, and there really wasn't anything complicated.
"FRIDAY, give me the kid's location." He'd referred to Peter as such often enough in the compound and the tower while requesting not-so-occasional readouts from his suit that FRIDAY didn't need any clarification on who he meant. She guided him to a nearby office building until the flashy spandex suit was in sight and he could finish the flight on his own.
He didn't have to look long to realize something was off. The kid was trying to be subtle by leaning against the building, but it was clear that only one foot was bearing any weight while the other hadn't moved from its position hovering just above the ground in the time since Tony had spotted him. Even though Peter was making a frankly awful attempt to hide it, he'd taken his mask off, and his pained expression told Tony everything he needed to know. He landed with the familiar light metallic clunk of nitinol on asphalt and moved forward until there were only a couple feet between him and his trainee.
"I'll carry you. Hold still or it'll hurt more." Tony didn't wait for any confirmation before he lifted Peter away from his perch against the wall and settled him into his arms. Peter pulled his mask back on without meeting his gaze, and then they were off, heading for the med bay in the tower while Tony plotted out his "For fuck's sake, don't hide injuries from your team" speech in intricate detail.