Tetsuka vs Vaan

Tetsuka glared at Vaan as she went in for another attack only to be stopped by a wall of earth.

"The earth is what allows metals like you to exist. You cannot beat your maker," Vaan growled.

"I'll beat your ass!" Tetsuka shouted as she went into dragon mode.

"You think coating your body with silver scales is enough to stand a chance against me? Listen well girl. I may have a higher rank within Illumous than my foolish brother, however, I have yet to top him in power. Once I return victorious, I shall ascend to the plane of Omnipotence and become a Omni like some of the other heads."

"Well sucks for you, I'll be snuffing you out."

Tetsuka then sent a wave of metal spikes around the earth wall. Vaan blocked them as Tetsuka leapt into the air and created a metal javelin. She threw it at Vaan, only for Vaan to turn himself into earth allowing the javelin to pass through him.

"That initial attack was merely a fluke. I couldn't risk the existence of powers becoming known," Vaan growled as he dodged a punch.

"Huh? I thought powers were common knowledge," Tetsuka questioned as she threw a metal spike ball at Vaan.

"Only the highest authorities in the world know about them. Should the public find out, it will create mass hysteria that only the faction leaders could mitegate!"

"Faction leaders?"

"For a Ginkawa you are ill informed. Leviathan, Averice, Luzurious, Superbia, are the four main factions. The Marauders of gluttony are also members though they are more of a secret execution force though there are some normal members allied with the gluttony faction."

"What about you?"

"I seek to form my own faction, the vanaglory faction," Vaan proclaimed as his ears glowed bronze with vainglory.

"And you think you're actually gonna win this fight?" Tetsuka growled as she created spiked metal knuckles on her fists.

"You cannot hit me, my earth powers are impervious to metal."

Tetsuka then attempted to encase Vaan in a metal box, however, Vaan dodged it by turning into earth.

"Shit, I need to get him in the box, if I don't I can't beat him," Tetsuka thought.

"You're close enough, just drop a big one from the sky," I said telepathically to Tetsuka.

"A big-!? Thanks for the tip Jouzu," Tetsuka telepathically replied.

She then smiled as she faced Vaan.

"This is it, Behold my largest attack! Metal dragon's EARTH CRUSHER!

Tetsuka formed a cannon and shot up into the air. She then began creating a mile sized hunk of heavy metal.

"You think you can crush me? You can't crush the earth," Vaan declared as he turned into earth.

Tetsuka then threw the ball with a mighty yell and flew down towards Vaan. Vaan unleashed some earth at her in order to reduce the impact of her attack.

"So the ball was a distraction, unfortunately for you, I saw through it," Vaan laughed as he began mummifying Tetsuka in earth.

"MMPH MMPH MMPH!" Tetsuka glared.

Only one of her eye's was visible as she struggled to break free and breath.

"This is the end," Vaan maliciously smiled.

*SPLASH*

Tetsuka's giant metal ball landed in the sea sending a flood of water crashing down on Vaan and Tetsuka. The water washed away the earth imprisoning Tetsuka, as Vaan was forced to take human form to avoid getting washed away. Tetsuka hardened herself and charged through the downpour towards the stationary Vaan. It was like they were underwater, however, Tetsuka was able to move normally thanks to her training.

I decided to play the intro song for her.

Red veins of wrath appeared on Tetsuka as she began began pummeling Vaan with a flurry of punches. Vaan became a bruised bloodied mess in seconds, but Tetsuka didn't let up, she kept punching and punching, and punching. When the water from the splash began to run out, Tetsuka summoned two metal paddles at the ends of her arms and began spinning around creating a whirlpool, Vaan was taken for a spin as Tetsuka shot metal needles into the current that found their way to Vaan. Vaan let out a painful roar as he turned into earth in an attempt to break free.

Tesuka then roared as she encased the entire whirlpool along with Vaan in a metal box.

"If you think I can't survive under water, think again! The sea floor is made of earth!" Vaan bellowed within the box.

Tetsuka then hurled the box into the sea. She created another box around the first one to prevent Vaan from slipping out when the first box began to compress due to the pressure. By the time he reached the sea floor, Vaan was forced to remain in earth pebble form as the metal box he as imprisoned in was too small to take any larger form in. Tetsuka then sent it along with another metal box and some water straight to the earth's core. Vaan screamed as he was burned to death my the magma.

I then destroyed him for good with a sea of my dark flames, eliciting a final scream from him as the intro song ended. Looks like the Omni-Deity he reluctantly made a pact with wasn't able to save him.

Tetsuka then let out a victory roar before hobbling off. She eventually ran into her sister's friend, Yuni and helped her get some things from the train station. As thanks, Yuni gave her a metal box with a knife stuck in its hinges and a small key. 

Once Yuni was out of sight, I then healed Tetsuka up as I warped her back to the mansion. She was now max level 100 just like Honoka, plus she had killed one of her older sisters. That act would make it easier for her to overcome the trial needed to ascend to the Omni plane of existence.