Shamrock wisely stayed out of All Might's fight and focused on rescuing Katsuki as soon as Tora fled the scene with Ragdoll. The rescue came first, then she could tend to her comrades.
"Bakugo!" she called out before sending four of the villains surrounding him several feet away from him with a concussive blast of air similar to All for One's earlier attack but on a smaller scale and less lethal. "Let's get you the hell away from these losers!"
"I DON'T NEED YOUR HELP, YOU FUCKING FAIRY!" was his extremely rude response after setting off multiple explosions, causing her to absorb more energy, which she absolutely did not need.
"DON'T CALL ME A FAIRY, DIPSHIT!" She shot harmless blasts back to back, keeping the villains away and trying to create an opening for them to escape. "All Might can't go all out if we're still here!"
To prove her point, the hero in question tried to come to their aid and was trashed by the head honcho villain. One of the villains, a dude with hands covering him, started to taunt them, giving Shamrock time to analyze the situation and to get a feel for the energy around her.
Five more signatures...She noticed them before, but didn't pay much attention to them since they didn't make any moves against them so far. Now it looked like they were gathering up to do something, like forming a ball of some sort. Teens from the looks of it...My age...Oh, you brilliant little bastards!
"Know anyone that can make ice?" she asked Bakugo, causing everyone to look confused.
"Yeah, why?" he asked before she grabbed him by the collar of his shirt and shot him up twenty feet into the air with additional force behind her throw. "FUUUUUCK!"
A resounding boom was heard along with ice rapidly forming, giving the Jr. Hero enough time to temporarily knock back the League of Villains with a larger concussive blast and giving Bakugo's friends a big enough window to escape from. She heard someone call out to the rescued, and saw three boys clinging together, plus Bakugo holding on to one of them, flying out of the battle field.
"ALL MIGHT, THE RESCUE'S A SUCCESS! GO FOR IT!" She called out before breaking away from the fight and noticing four more heroes on the scene. Gran Torino, Kamui Woods, and Endeavor went to aid All Might by clearing the field of civilians while Edgeshot quickly brought over the downed heroes to her. Mt. Lady was already semi-concious whereas Best Jeanist moaned and Orca Seis was still out with blood dripping from a minor head wound. "Mt. Lady first, then Jeanist, and Orca's last since I'm pretty sure he's at least got a concussion."
"I didn't believe you at first when you said you could grow wings," the ninja hero remarked, watching her wings shrivel up while healing the heroes. When Mt. Lady was fully healed of her injuries, the wings fell off Shamrock's back. "Do they have a purpose?"
"It's my body trying to make more room for storing energy," she explained, giving Mt. Lady and Best Jeanist the go ahead before moving on to Orca Seis. "I'll explain in more detail la-" She stopped, sensing a massive build up in energy.
"CLEAR THE FIELD!" Gran Torino shouted. All Might stood fast, ready to take the hit and save the lady behind him. Edgeshot quickly grabbed her patient and ran, not noticing her moving in the opposite direction in time.
He didn't have much longer left. His muscular form was already worn out past it's limits. All for One launched a massive blast, and he was ready to meet it with his fist.
However, All Might didn't see Shamrock until she grabbed his fist while reaching out her other hand to receive the blast, and he watched in pure horror as the teen hero absorbed the massive amount of energy and quickly converted it into something else. He heard Edgeshot call out, echoing the fear he felt for the youngest hero.
She cursed up a storm in her head. Converting this massive amount of energy was pure torture for her. Every neuron in her body felt as if they were each being stung by a hundred fire ants. Most of the energy went to healing All Might-which she now noticed was literally on his last leg-but doing that wasn't enough to get the energy out. Her body had produced eight wings; her absolute limit before things hit critical for her. That moment spanned only three seconds, yet it felt like more for Shamrock.
There was no relief for her when the blast finally died and the two heroes remained standing. All Might was back in peak condition, but the same couldn't be said for Shamrock. Her outstretched hand was badly burned , her entire body shaking from what it did in an impossibly short amount of time, and blood trailed from her nose. She stepped back, out of the way, looked All Might in the eye and said, "Go for it."