Of course Tetsumaru and Mei could use the Rasengan. That technique did not require hand seals, nor an internal movement of chakra through the Tenketsu points. Its basis was the external manipulation of chakra, and manipulation was the most outstanding aspect of both pirate incarnations.
The rotating, stable sphere on Tetsumaru's palm illuminated the shinobi's side, which would have made the scene worthy of description if he were not in his underwear, given the bad timing of the enemy attack.
The Nomu armed to the teeth swung its appendages, knocking down trees with a single slash and charging at the shinobi at full speed.
This time, Tetsumaru ran to meet it, sliding agilely through the forest foliage and reaching the Nomu in a matter of seconds.
He had already memorized the Nomu's attack pattern, he already knew its reaction speed, its particularities when attacking with both its fists and its appendages, which were not as versatile as one might expect.
They were extensions of flesh that were too thick, so they could not bend as if they were tentacles.
In a blink, both opponents were facing each other, the blades and saws closing in on Tetsumaru with the intention of cutting him into pieces.
Tetsumaru abruptly shifted his weight, dragging his feet on the forest floor and ignoring the pebbles digging into his soles. A pulse of chakra attempting to mimic the shunshin shot along his Tenketsu points, following the least painful but fastest pattern he knew.
With a sudden burst of speed, the shinobi's figure blurred into a streak that shot to the left, narrowly avoiding the blades that descended like a guillotine on his previous position.
The event was so fast that the small Nomu following them failed to react in time, suddenly finding itself facing a giant sphere, the size of a beach ball, slamming into its chest with colossal force.
The kinetic energy of the rotating sphere deformed its dense flesh, with marks extending and skin twisting in a spiral shape.
Tetsumaru pressed with more chakra, pushing the Nomu and the Rasengan against the trees while he himself jumped aside, dodging another charge from the armed Nomu.
He quickly pulled more sand from his seals, forming a platform that lifted him over the trees and shot him toward the fire that was beginning to cover this section of the forest with smoke.
He was not a fighter, after all. He was a Hero, and as a Hero, his priority was to secure Ragdoll, because that Dabi guy was no joke and with a support Quirk like the PussyCat's, Tetsumaru doubted she could stand up to him.
The armed Nomu tried to chase the shinobi again, but a small needle blacker than night itself fell from the sky, penetrating the dense crystal protecting its exposed brain and lodging itself in the organ.
The creature continued its march, ignoring the event. But within ten seconds, its functions began to fail and its body stumbled, its limbs weakening and its motor coordination becoming sluggish.
At that moment, a scarf that was not a normal scarf wrapped around its legs while the slender figure of Eraser Head jumped onto the Nomu.
Aizawa noticed his student's attack but decided to seize the opportunity and subdue this monster. He would talk to Tetsumaru later about whatever he had done.
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Mei pulled out a kunai she had secured to her thigh. It was a tool she had demanded from Nezu after the Principal took her Nomu Eyes, made from a rare alloy whose name she had already forgotten.
Without a second thought, she stabbed the ugly fat man who emerged from the dark portal, who was smiling awkwardly at her, his puffy cheeks trembling with every heavy step he took.
The blade sank into the flesh of the man's thick arm, burying itself several centimeters but yielding not a drop of blood.
—Hmm? Why does a little girl like you have such a dangerous weapon?— the man questioned with a perplexed expression. —Give me that, little one. You might hurt someone.
With every word, the fat on his face moved, his cheeks jiggled, and his non-existent neck vibrated. Golden pupils reflected the kunoichi's stern face, a flash of mockery and amusement directed at her attacker.
Mei retracted the kunai, stomping the ground with one foot while the other quickly rose until it found the space between the man's legs.
Her leg sank into that sensitive area with visible difficulty until an unknown force pushed it out, as if she had hit rubber.
—Huh, they were right. You have a strange fetish for destroying men's virility. Too bad for you, Terumi Mei. You met the wrong guy— the man mocked as he extended his hand toward the kunoichi.
Mei noticed metallic-edged openings in the man's flesh. Veins bulged and began to pump some liquid.
She opened her own palm, unleashing a massive wave of water into the guy's face.
But to Mei's surprise, the water simply deflected to the sides, and a mass the size of a bus emerged from the middle, nearly hitting the kunoichi.
Moving quickly to the side and trying to circle the opponent, Mei stepped on a viscous section on the forest floor that made her slip and roll awkwardly across the ground.
—What the hell is wrong with this guy?!— she thought, frustrated. She forced her chakra to bubble inside her, shaking and heating it up quickly, a mass forming in her stomach and ready to spray steam at the fat bastard.
But the guy's body bulged and more veins began to pump liquid through his body, subtly shaking his greasy flesh as everything condensed into his fists.
The kunoichi parted her lips and a dense, high-temperature mist was shot at the man, who simply charged forward, as if he did not fear the consequences.
And Mei discovered why he did not seem to fear it for the wrong reasons.
An expulsion of a dense liquid from the man's hands collided with the steam, which resulted, to Mei's surprise, in the heat being absorbed by the liquid and her steam condensing back into hot water upon contact with that sticky stuff.
She had to dodge to the side again, but as the mass of liquid approached, a consecutive series of explosions splashed that stuff everywhere.
It was then that Mei recognized what she was up against. Especially when a good amount of that stuff fell on her, burning her skin with a hiss.
—Hnngh!— she groaned, her eyes intently observing the mass of liquid in which her water traveled, as if it rejected the idea of mixing.
—Kuku, it's useless, little one. Your water cannot penetrate my oil and your steam will only hurt you— the man mocked with a rather hideous, ear-to-ear grin.
Mei glared at the fat man, her mind racing with possibilities. She quickly made a decision and turned toward the camp, resuming her run once more.
There was no point in wasting time in a one-on-one fight when she did not know what the hell was going on in that place where the UA kids were. Especially considering that she did not remember this greasy fat man in the anime.
Side character? Maybe. She only remembered the one with the teeth and the fire zombie.
But as the kunoichi turned her back and ran, the man's smile widened. The next instant, several portals opened around her, dropping some figures who quickly went into a panic.
—W-what the hell?!— Hagakure Toru screamed, her voice reaching Mei's ears, who dug her feet into the ground and abruptly stopped.
She turned back toward the man, just in time to see him slam a kick into the invisible girl that sent her rolling across the ground.
—Ah, weren't you leaving? Please, continue. I'll stay and play with these brats— the pig suggested.