(Disclaimer: I do not own Rosario+Vampire or Kamen Rider Sango. They both belong to their respective owners. I just own this idea, which might become a story, and my OC's)

Rider X Vampire: The Third Guardian

"Hold it right there! There's no where left for you to run!" said a man in a black body suit with double white lines on both sides. A belt rested around his waist as he wore white gloves and boots, green armor pads, a grasshopper themed helmet with red eye lens, and the most notable feature was the red scarf he wore around his neck.

"Kamen Riders..." said a cloaked red man.

"Now let's see what you look like." said another armored man who looked identical to the first one except that he head only one white line on the side of his suit and he wore bloody red gloves and boots.

These two armored men were none other than Kamen Riders Ichigo and Nigo and right now, they were finally confronting the leader of evil organization, SHOCKER.

Nigo went and tore off the hood of the leader, stepping back in surprise as his head was covered in snakes.

"So, you've seen my true form, Riders."

"So that's what you look like?" Ichigo asked.

"You managed to completely destroy SHOCKER." said the leader. "But I'll at least drag you two to hell with me!" A bright flash of light stunned both Riders. Acting fast, they tried to take out the leader, but he just took their attacks and laughed. They then both pulled of the snakes and stepped back in surprise when his head was nothing but a great white head with red cracks and a single eyeball.

Both Riders were completely speechless as the leader spoke. "SHOCKER meets its end here! Die with me!"

Both Riders quickly jumped back when parts of the room exploded. Rubble fell down and crashed upon the leader as both Riders stare at the spit the leader of the evil organization once stood.

"And that's the end of SHOCKER's leader." Ichigo said before turning to his comrade. "Let's get out of here, Hayato."

"Right, Takeshi." Nigo nodded before they both made their get away.

(Outside)

Both Riders managed to get out safely as they rode their trusty motorcycles.

SHOCKER was defeated, their fearsome leader dead. For Kamen Riders Takeshi Hongo and Hayato Ichimonji, their long, painful struggle had finally come to an end...At least, it should have had.

"Hm?" Both Riders raised their heads when they heard the sound of a third vehicle.

Up ahead was a white car, colored red in the middle and along the doors as several boosters were seen at the back.

"A car?" Who could be driving all the way out here.

Suddenly, the front parts opened up and two machine guns popped out, surprising the Riders. Not a second was wasted as the guns unleashed rains of bullets. Acting fast, both Riders jumped, avoiding being turned into swish cheese and jumping over the car and landing safely as both Riders and the car came to a stop.

The driver then got out, showing that he was no ordinary driver. He wore a black body suit with double golden lines on both sides. He wore light blue armor pads, gauntlets, and boots as a pair of broken shackles were around his wrists and ankles, bearing SHOCKER's logo. Around his waist was a belts with two little rockets at the side. His helmet was themed as a grasshopper as well as the mouth guard was light blue while the top part was dark blue with yellow eyes. The most notable feature was the yellow scarf around his neck.

Both Riders got off their motorbikes as Ichigo pointed to the mysterious masked driver. "Who are you?! Identify yourself!"

"...Sango." said the mysterious masked driver. "My name is...Kamen Rider Sango."

"Nani!? Sango!?"

"I was created to destroy the traitors, Ichigo and Nigo." The now identified Sango said. "Now, prepare to die." And then, he attacked, smoke erupting from the little rockets on his belts as he flew towards both Riders with surprising speed. He led with a punch, but both Riders were able to dodge. Turning around quickly, Sango kicked Nigo before punching Ichigo. They both stumbled back before they fought back.

Ichigo went in first with a punch which Sango dodged who then quickly ducked to avoid a jumping kick from Nigo. Nigo landed and quickly turned around, throwing a punch, but Sango batted it aside and grabbed Nigo's shoulder to knee him in the gut, making Nigo bend down. Sango then threw him aside as Ichigo came in with another punch, but Sango stepped aside, grabbed his outstretched arm and judo throwed him to Nigo.

"I told you. I was created and specifically designed to take you both down. You can't win." Sango said as he clenched his right hand into a fist as blue colored spark appeared for a brief moment. "Rider Punch." He then jumped towards them with the empowered punch, but both Riders were able to get up and jumped back in time to avoid the attack, said attack causing parts of the earth to fly up as debris and dust littered the air. Not only that, but the punch caused a part of the cliff to break apart and fall into the ravine below.

Just from trading blows with him, both Riders knew that Sango was powerful. But if there's anything they can't do alone, they can overcome it with teamwork. With that thought in mind, they both attacked together with Sango meeting their challenge. He threw a punch, but they both dodged at the same time and back kicked him, making him stumble forward which gave the two a chance to throw another double kick at his back, sending him flying back a few feet. Just as his face was about to hit the ground, he landed on his hands and flipped back up to his feet, turning back to the Riders who were already attacking again as they both sent a double punch. He crossed his arms in front of him and managed to block the attack, but was sent skidding across the ground before stopping.

"Impressive. Though I should have expected as much from you two." Sango said before lowing his arms. "But this is where it ends."

"That's what you think!" Ichigo said before turning to his partner. "Let's go!"

"Right!" Nigo said before they both jumped.

Seeing what they were about to do, Sango jumped too as all three Riders stuck out their kicking feet.

"Rider!"

"Double!"

"KICK!" All three of them shouted before they collided. The finishers caused a huge explosion as appearing out of it were all three Riders, looking unharmed. They all got back up with their backs turned against one another...until both Ichigo and Nigo cried out in pain and fell to the ground as an explosion took place followed by a wave of some sort of green energy. Both Kamen Riders Ichigo and Nigo...were killed.

"They were...strong." Sango said, turning to the burning flames that were once Japan's greatest heroes. He suddenly gasped in pain before sparks erupted him, the result of both Ichigo and Nigo's Rider Double Kick. He cried out in pain as sparks flew before they subsided and Sango fell back, falling into the ravine.

(Some Time Later)

"It's over for you, Seth Aberrant!" Kuyou shouted as Seth and his friends lay down on the ground, too badly injured from Kuyou's earlier attacks. "I have to hand it to you, Seth Aberrant. No human has ever wounded as much as you have. I guess it's thanks to your strange, super human strength and endurance. They've really helped you live for this long while living here."

"Dammit!" Seth cursed as he slowly got up.

"I see you're nothing, but a glutton for punishment." Kuyou said before had conjured up more blue flames. "As much as I want to get your execution wrapped up right away, I have a better idea. For allying themselves with a filthy human like you, I'll turn all your friends into ashes!"

Seth eyes widen in horror as the flames got bigger and bigger until he was starring at a raging blue sphere of flames that felt as if it were the core of the planet itself. His mind began to wonder what would happen if Kuyou threw that attack at them. All of them were too badly injured meaning none of them could take that attack and survive. There was just no way. With that thought in mind, Seth did the only thing that could into mind.

"STOP!" Seth cried. "I...I give..."

"Seth!?" All the girls cried out in surprise. For as long as they got to know him through out the school year, Seth was one to never give up. Hearing speak those words really shocked them.

Kuyou raised an eyebrow at Seth's broken words.

"I'll...I'll leave the academy. I admit to being a human. I'll even let you execute me in front of everyone if that's what you want!" Seth said, hanging his head down in shame. "Just...let my friends go, please."

"You put your friends over your own life?" Kuyou asked as the famed died away. "Admirable...for a human." Hope began to gather in Seth as he saw Kuyou's eyes soften. "I am not without mercy, boy. You have shown great courage and I will take that into consideration."

"Thank you..." Seth said.

"I was going to make them suffer a slow death..." Kuyou said, his hands burning with flames again. "Instead, I'll end their lives quickly."

"What!?" Seth's eyes widen in horror as Kuyou smiled wickedly at him before turning to Moka. With one motion of his hand, he fired a bullet of blue fire at the vampire. Closing her eyes, Moka could do nothing, but wait for the flaming projectile closed in on her and...nothing. There was no pain, no flaming bullets hitting her. Opening her eyes, Moka stared in horror as none other than Seth was standing right in front of her, burned as his jacket was gone, showing that he had taken the attack meant for her.

"Hey now..." Kuyou smiled in mild surprise. "It's no fun if you die first."

"S-Seth..." Moka stuttered in horror and surprise.

Seth said nothing as his body began to sway before he fell back, Quickly, she caught him as she got a good look at his current state. Third degree burns were all over him as Seth's eyelids were half closed.

"Are you...alright?" Seth breathed out as he struggled to keep his eyes open.

"Me!? What about you!?"

"Is it wrong to...try and save...a friend?" Seth said as he reached out his hand and grabbed the silver cross hanging from her neck. "This is...all that I...can do." With all of the strength he had left, Seth yanked the cross off of her. "Give...him...hell...for me..." And with that, his eyes closed as he dropped the cross to the floor.

"Seth? Seth!?" Moka shook the boy, desperate for an answer, but she got none. "SEEEEEEEEEEEEEEEEEEETH!"

(Seth's Conscience)

He didn't know how he knew, but Seth knew that he was currently floating in some back void, not even a single sign of life or light in sight.

'So, this s what it feels like when dying...' Seth thought. He was sad of course. He would be leaving his friends behind and plus, he never regained his memories. But, knowing that his friend were in good hands, if you can call Inner Moka good that is, he wasn't worried as he continued to float around the void.

Are you going to let it end like this?

'Hm? Who...'

Are you just going to let it end like this? Are you just going to leave your friends alone? They were only able to become friend because of you. Are you really just going to leave them alone?

'...No.'

Are you just gonna die without even recovering your lost memories?

'No.'

Then I ask you, are you going to let it end like this? Do you...want to die?

"No!" For the first time, Seth spoke. "There's...There's still so much I want to do! So much I need to do! I can't die here!"

...Good answer.

Suddenly, images suddenly flooded into Seth's mind, causing him a headache as he held his head in pain. He saw things, strange this. Men in lab coats looking down at him, machinery parts, human parts, some sort of belt, and finally, a symbol of a bird with the words: S.H.O.C.K.E.R.

(Back in the Real World)

"Weak." Kuyou said, sighing disappointment as he walked towards the downed vampire. As he walked towards the girl, his tails created an arch above his head as fire sported from the tips, collecting to form a massive blue ball of flame. "If you hadn't given your blood to that miserable human, you might have had a chance. Now burn in hell for your stupidity.

*SLAM!*

Everyone froze when they heard a fist hitting the ground, Turning, every stared in surprise as Seth was getting back up.

"Seth Aberrant..." Kuyou said in surprise and a bit of anger as the flames died. "Why won't you just stay down and die?"

"Sorry, but it seems death doesn't like me very much." Seth said as he got back up to his feet.

"Seth!" All the girls looked relieved to see Seth alive and back up on his feet. Suddenly, an enormous aura filled the entire room and the source was coming from Seth.

"W-What the hell is happening!?" Kuyou wondered as he stared at Seth. The aura he was emitting was monstrous, even surpassing his own. For the first time in his life, Kuyou was scared.

Inner Moka grimaced as she stared at the aura Seth was producing. This was the one problem she feared. Sure, while vampire blood was good for healing, it was unknown what could be happening inside Seth's body. But to her surprise, Seth looked like he was still sane.

'But that's impossible. He should be acting on instinct.'

"Moka..." Inner Moka was brought out of her thoughts when Seth turned towards her. "Thanks for softening up Kuyou for me. I'll take care of things from here."

She and the others wanted to protest, but the look on Seth's face plus the aura he was emitting made them zip for some unknown reason, they knew he had plan.

"Hmph." Kuyou scoffed, regaining his barrings back together as flames surrounded him. "You must have left your brain back on the other side. A human like you can never defeat a god!"

"A god, huh..." Seth muttered. "Funny you say that, Kuyou. My kind...has this thing for taking down gods." Suddenly, he placed his hand at his waist before sliding it across, a belt suddenly appearing out of no where. Seth then extended out his arm before he pressed down on the rocket to his right side. Then, he swung his arms over to the left as he said one word.

"Henshin!"

He then pressed down on the left rocket before he jumped, the rockets boosting him up into the air as a light covered him, blinding everyone temporarily as Seth landed and looked different.

From head to toe, he was covered in armor. He wore a black body suit with double golden lines on both sides. He wore light blue armor pads, gauntlets, and boots as a pair of broken shackles were around his wrists and ankles, bearing logo of some kind of bird. Around his waist was a belts with two little rockets at the side. His helmet was themed as a grasshopper as the mouth guard was light blue while the top part was dark blue with yellow eyes. The most notable feature was the yellow scarf around his neck. Also, for some reason, black feathers appeared out of nowhere and fell down around him.

"W-What the hell?" Kuyou pretty much spoke for everyone as they all stared at Seth's new appearance. "Who...Who are you?"

The newly transformed Seth said nothing before he raised his right hand and grabbed the wrist with his left. "Ore wa...Kamen Rider Sango."

And done! I don't know if it's just me, but I can barely find any stories involving Sango! Seriously people, he's got the potential to make some pretty good stories if you've got the right kind of mind. As you can see, instead of Sango out right destroying Ichigo and Nigo like a boss, his fight ended in sort of a draw, resulting Ichigo's and Nigo's death and causing Sango to fall into the ravine where he would later find himself at Yokai Academy. And as you can already see, I'm using Seth. From Shinigami to Android and now to Rider. Once I have some stories done, look out for this story in the future. This has been Ashbel Longhart here, signing. Till next time.