*replace Kaneki with Eto*

[No one's POV]
Nobody can comprehend what's going on. Eto Yoshimura..why was she here in this world.

Y/n: Why are you here, Eto?

Eto: A Portal appeared in front of me with a voice saying: "test your skills on Ganbarizing". So, here I am. Also, these things came with me.

She moved aside to reveal three Spider Amazon's growling of hunger..

Megumin: *tugs y/n's sleeve* Who is she, Y/n?

Y/n: She's a One-eyed Ghoul.

Chris: A One-Eyed Ghoul?

Y/n: Half-Human/Half-Ghoul.

Aqua: Umm..

Y/n: Ghouls can consume flesh from human beings like us. It's the same for the monsters with her..

Luna: *hides behind y/n in fear*

Eto: You are right about that. However, my only concern is fighting.. *points to Y/n* you. Should you refuse, you're friends will be my food source..

Kazuma: F-food??

The SHR Ridebooker shot out a card which y/n catches without looking and it revealed to be Kamen Rider Amazon Omega..

Y/n scans the card as the belt shifted into Amazons Belt with Omega's faceplate on it..

Eto: Oh?

Kazuma and the girl decides to step back, knownig there's gonna be a major fight.

Y/n let out a breath from having the Amazons Driver on, before his breathing became more and more erratic, with the right hand grasping the handle of the driver on the left.

Y/n: UUUUUUUUAAAAGGGGHHHHH! *twists the handle back into it's neutral position*

[OMEGA]

The eyes of the driver lit up red as Y/n's eyes changed into a similar red colour.

Y/n: AMAZON!!

Eto decided she had enough of waiting, as she rushed at him, only to be knocked back by a powerful force of energy that exploded outwards.

[Evo-Ev-EVOLUTION!]

He had transformed into his Amazon form, but something was different. He appeared less beast-like and sleeker, but still very terrifying to look at. His green skin seemingly cleaner and shinier than before, and decorated with red stripes on parts of his body. The chest has become more refined and armored as well with the chest being a yellow-orange color and muscular while the upper part of his body, near his neck, acted as a collar. On his back sported sharp, black spine-like extrusion. Overall, the skin was more armored than before. Displayed on his left upper arm was the Amazon Register, with the 'eyes' of the device glowing blue indicating that it was still functioning. The forearms and legs below the knees were covered in glove-like black armor with spikes on them. However they could tell his hands were ready to tear anything apart, even through the strongest metals. And finally, his head was altered the most, no longer sporting a visible jaw. Instead, It looked like a silver mouthplate. The top 'fin' fanned out higher as the horn was now a more shinier golden color with the tip being dull instead of round. The eyes became more angular but the red eyes promised the spilling of blood.

All of a sudden, y/n's mind started to spoke within him..

[Kill..Kill]

The three Amazons screeched at him before charging towards the newly formed Amazon. Y/n then sent out a demonic roar, seeing them as a threat and challenge and met in the middle.

[Fight]

When the first Spider Amazon tried to strike the newly formed Amazon, the latter blocked its attack before lifting it up and threw it to the wall, creating a dent.

He punched the other away, colliding with a few tables that broke upon the Spider Amazon's weight. It marched towards it as the newly formed Amazon lifted the Spider Amazon up before it slammed the spider to the ground, creating a small crater before it lifted it up again and swung it to the ground, breaking a boulder in he process..

The Spider Amazon flailed its arms until the other one rushed towards the Omega and got onto his back, biting into his skin. Omega roared out before grabbing the appendage on the Amazon's back and ripped it right out, dark blood pouring out of its wound as the kaijin screeched in pain. The green Amazon grabbed it again and made it get off of him.

It then grabbed the right handle of its belt in which the belt announced it.

[VIOLENT BREAK]

Omega gripped the right handle of his Amazon Driver and pulled on it. Black splotches of liquid spilled before a spear was now in his hand, black fluids dripping before it dried, hardening the blade.

He threw his spear at the first Spider Amazon, impaling the monster in the chest as it was sent flying across the ground until it hit the pavement. The kaijin coughed out blood from its jaws before its body fell limp, melting into watery dark flesh.

Kazuma: Woah...

It roared out at the melted flesh before looking at the other two kaijins, growling at them. The kaijins screeched upon the loss of their fellow Amazon before they charged at him. However Omega had another thing in mind as it gripped the left handle and twisted it.

[VIOLENT PUNISH]

The spikes on his forearm extended and he rushed at the last two Amazons, slicing them in half. The Amazons that were cut in half split apart before the bodies melted into watery flesh, leaving only the respective armbands intact much like the other one he has killed. The Amazon was growling as he looked around, seeing any further threats before turning his head to Eto.

Eto: My, talk about a bloodrush. Now..

She laughed crazily as body spammed as her Kaguja springs out her body and encased her. Her body grew 6 times her size as she changed grotesque being called the One Eyed Owl. She stares at the stunned Amazon and gives off a malicious killing grin..

*Just know that despite being transformed..she can still speak here. However her voice is Distorted.*

Omega: Oh..shit.

The One-Eyed Owl claws at Omega, promting the Amazon Rider to Evade.

Omega: Whoa!

Omega flipped over a launching tentacle in front of him and jumped on top of other running towards her. He then gripped the left handle and twisted it..

[VIOLENT PUNISH!]

His forearm spikes extended one more as the rider charges to slice her. He nearly wouldve slice her dark big eye out if a tentacle didn't pierce through his leg with dark-colored blood spewing out.

Omega: Ahh!!

She then hurled him into multiple boulders before slamming him to the ground. He got up with the mouth part of the helmet broken off..

Eto: I̷s̷ ̷t̷h̷i̷s̷ ̷r̷e̷a̷l̷l̷y̷ ̷t̷h̷e̷ ̷b̷e̷s̷t̷ ̷y̷o̷u̷ ̷c̷a̷n̷ ̷d̷o̷?̷

Omega: Don't test me..

He ripped the tentacle out his leg with his talons, allowing his wound to heal and charged once more.

Eto: ̷J̷u̷s̷t̷ ̷g̷i̷v̷e̷ ̷u̷p̷.

The One-Eyed Owl lunges at the Amazons Rider to maul him, but he slides underneath her. She then shoots out sharp crystals as Omega darted forward, evading each of them and slicing off one of her arms with his Violent Punish.

Eto: *growls in pain* ̷I̷n̷t̷e̷r̷e̷s̷t̷i̷n̷g̷.̷ ̷B̷u̷t̷ ̷I̷ ̷a̷m̷ ̷s̷t̷a̷r̷t̷i̷n̷g̷ ̷t̷o̷ ̷g̷e̷t̷ ̷t̷i̷r̷e̷d̷.

Her left arm grew back as her body begins to be enveloped in a purplish Aura.

Omega: Oh, damn. I don't like the look of that.

She lets out a ear-screeching dug both her arms into the ground, creating multiple spikes that rose from the ground after the Amazon..

Omega: Oh, God!

Omega jumped in all places aboidi,avoiding, the petruding spikes rapidly coming out of the ground..

*You are Venom. Eto is Riot*

As he dodged the last spike and lands on the ground..

Eto: ̷B̷i̷n̷g̷o̷.̷.̷

Omega then get unexpectedly impaled through the back by a surprise petruding Spike with her Kagune..

Aqua/Megumin/Darkness/Luna/Chris(Eris)/Ashley: Y/N!!!

Eto violently ripped the tentacke out of the Amazon, leaving a gaping hole on his chest to back..

Omega: *coughs up blood* D-damn it..

Eto: *crawls to him* W̷h̷a̷t̷ ̷a̷ ̷s̷h̷a̷m̷e̷.̷.̷i̷ ̷g̷u̷e̷s̷s̷ ̷G̷a̷n̷b̷a̷r̷i̷z̷i̷n̷g̷ ̷i̷s̷n̷'̷t̷ ̷t̷h̷a̷t̷ ̷s̷t̷r̷o̷n̷g̷ ̷a̷f̷t̷e̷r̷ ̷a̷l̷l̷.̷

His ridebook appeared in his hip glowing before it shooting a card on the ground in front of Omega.

The Amazon's Driver shifted back into the Ganbaride Driver and because of that, forces y/n to revert back to normal.

Y/n: Oh god, this is Painful..

He grabbed the card, breathing in between sharp pains, scanned it and it changed from the original Amazons driver to the Neo Amazons Driver. It also produced the Injector in his hands..

*only the New Omega Injector*

Y/n held his breath, turned to his side and equipped the Neo Amazons Belt onto his waist and inserted the injector in the slot. Before he could press the button, Eto grabbed him with her large clawed hand. She then gives him a squeeze, forcefully making y/n gush out more blood..

Eto: ̷Y̷o̷u̷'̷r̷e̷ ̷a̷l̷r̷e̷a̷d̷y̷ ̷c̷l̷o̷s̷e̷ ̷t̷o̷ ̷d̷y̷i̷n̷g̷.̷ ̷W̷h̷y̷ ̷d̷o̷ ̷y̷o̷u̷ ̷s̷t̷i̷l̷l̷ ̷f̷i̷g̷h̷t̷?̷

Y/n: *Groans in pain* Do..do you honestly believe that I would just give up and die, while you are still here?

Despite being in a crushing hold,, He still manages to press the button, injecting the content to the belt, making the belt's 'eye' glow according to the Injector's content color..

[New Omega!]

Y/n: A-MA-ZON!!!

The One-Eyed Owl's Burned from from outwards energy exploding from Y/n's Body, forcing the Ghoul to throw him off. This energy also healed his gaping wound from earlier. His Amazons Form is similar to the original, but there were some technical enhancements on the Omega Header. Half of the faceplate was silver, the shoulders and chest gained some armor. The forearms were also coated in silver armor while the rest of the suit..looked the same. He is now Amazons New Omega

He slowly gets up and admires the new look on him..

New Omega: Despite lacking more technical enhancements..I'm tough enough to take you down.

Eto: ̷J̷u̷s̷t̷ ̷t̷r̷y̷ ̷i̷t̷!̷!̷

They both charged at one another. New Omega's Speed increased a lot, allowing him to evading her attacks more efficiently..

Eto: So..he's gotten faster.

She then got on all fours and fired a barray of crystals. New Omega quickly used his talons to deflect each that came close to him..

He then repeatedly slashed her body all over. Arms, legs, underbelly, back and her large eye. The large Ghoul was now laying weakened from these attacks, bleeding from the wounds..

Eto: ̷H̷-̷H̷O̷W̷?̷!̷!̷.̷ ̷

New Omega then reached to his belt and pressed the injector..

[AMAZON PUNISH!]

New Omega had two blades popping out of the forearms as he charged forward. First, he hacked off the right arm, while dodging a clawed swipe the Ghoul attempts to use. He lands on the back and slashes multiple spikes off her, making the Ghoul howl in pain. It lunges again, Omega jumped over and performed a spinning attack all over the arm until it fell apart

He then slid underneath and hacked off her legs and sliced open her underbelly. Due to the injuries she received, Eto was kicked out of her kakuja form by ganbarizing New Omega and rolled out on to the floor, she sat on the ground with her legs shaking from the impact of the Rider kick.

As New Omega leaps into the air about to do a finisher on eto, an energy ball hit the Amazon, making him fall back down to the ground..

New Omega: *groans* What just hit me?

He gets back up and sees an aurora curtain in between him and eto and a female voice was heard..

???: Your are needed elsewhere, Eto Yoshimura.

She sighs in relief and looks at ganbarizing and smirks before turning to the three hooded figures..

Eto: Ok, ok. Give me a moment. *turns to Y/n* Ya know, there was only two-no three people who knocked me out of my owl form. I'm impressed

Ganbarizing: Oh yeah and who are they?..

Eto took out a black broken half bottle like object and raised it up blocking the view of the sun from her vision

Eto: Someone I miss very much with all my heart.

Ganbarizing de-morphed back into y/n as Eto continued speaking..

Eto: *Smiles* Hey do me a favor...

Y/n: Huh?

Eto: keep your friends close and don't think on your own ask your team for support. *looks down to her left bandaged hand and a tear drop falls danmping it* don't make the same mistake I made...

Y/n: I dont understand. Why would you choose to fight me?

Just then a dimensional portal appeared and a voice was heard

???: Eto let's go....

Eto: Im coming..*to y/n* Remember it's good to rely on yourself but it's better to trust and rely on your team...goodbye...

Y/n: H-hey wait!

Eto walked backwards to the portal leaving the young rider, confused he then looked at the dimensional portal and sees three rider shadows one showing a rider with harvest gold eyes in a battle pose.

The second one showing a long red eyes sliding his hand across his long red eyes. The third one showing his purple like eyes and his body language looks like he's pushing his finger between his rider eyes..

First shadow: *Echo* HA!

Second shadow: *Echo* Caio!~

Third shadow: *Echo* Hmph!

Before the portal closed off, the figures threw y/n some cards, which he caught. They were white as he watched in the upmost confusion before they disappeared.

Y/n: *looks at the cards* What could they be?

The cards stopped glowing as they revealed to be Build, Evol and Mad Rogue..

He then heard someone coming..

Luna: Y/n!!

The rider then gets glomped on by Luna, followed by Ashley, Megumin and the rest of the girls..

Y/n: Can't..breathe.

Girls: *realize what they're doing and gets off him* Sorry!

Kazuma: You are getting tough fighting these villains.

Y/n: Heh..*gets up from the ground* i try.

Darkness: I'm so glad your ok, y/n.

Y/n: I'll always come up strong. *realizes something with Chris* Oh, Didnt you say that you wanted to talk to me about something?

Chris: *face turns slightly red* O-oh, yeah. Can you talk in the inn?

Y/n: Okay..sure.

Chris smiles before she grabs his arm and drag him to the inn, much to the girls watching..

Kazuma: You lucky bastard.

[At the Castle]
Shade was observing the fight through a glass panel with Ganbarizing and the One Eyed Owl Eto.

Cronus: It seems that he is getting stronger..

Dark Kiva: What shall happen next?

Shade: So close to dying.. and yet he kept advancing. I think it's almost time i fight him myself.

[Many thanks to DarkDecade217 for helping me with this chapter. If it a ain't for this guy..this chapter wouldn't be here.]