Now then, thanks to those who favourited and followed this story. Your reviews made me burst into tears. Thank you.

Let's see... about whether or not Percy is the strongest demigod. Hm... I dunno, actually. If this is any other stories, then yeah, Percy would be. But I have a firm belief of older siblings are better than their younger siblings, moreso Firstborns, so... let's just wait and see.

Pairings... hm... I already have someone in mind, and sorry readers, but I want my boy Regulus here to be paired with a character from the series.

Ray's death... I... don't really want him dead, though. So... maybe... not? I mean, I could be changing my mindset over this story so I don't know, but for now, that is highly ulikely.

Percy? The child of prophecy? Absolutely! I tried making my own prophecy one time and it was, needless to say, bad. So I'll just probably make an impromptu prophecy like Mars in the Son of Neptune.

And of course, SpartanBoy, I'll keep that suggestion in mind. God knows my stash of souls is starting to dwindle.

Okay, I own nuffin. I only own my OCs.

~0~

A Not-So Good Trip

~0~

This was not happening. Sally didn't want this to be happening. But it happened. Ray knew.

She thought everything would be explained when Ray arrived at camp, that everything would be explained when he was relatively safe. She never wanted her son to know about his existence on a hospital bed with his left arm inside a cast. But of course, Fates had other plans.

Sally bit her lip. It was no use denying it now, especially after Ray dreamt about his father. She hoped that she could stall time, but then she realized that her hopes had never been fulfilled recently. So she did the next best thing. She told her son to pack up quickly.

Ray, although confused, complied, and a half an hour later, the three of them had left the hospital, waiting for a cab. Sally kept glancing over her shoulder, then everything around her, looking for possible monster threats. She knew that demigods would attract monsters when they found out about who they were, and her son would only attract more monsters than usual because he was a child of the big three.

Ray and Percy noticed this, of course. They were too sharp for her liking, but she supposed that was a good thing. "Mom, what's wrong? Why do you keep... doing that?" Ray asked, getting worried.

"Doing what, honey?" Sally replied, but she kept glancing behind her. That shadow wasn't there when she looked the first time.

"You're doing that again, mom," Ray pointed out, "What are you searching for?"

Well, she wasn't really searching per se. She was searching, yes, but she was searching for things she hoped weren't there. So... the word 'searching' probably wasn't the correct term. And that was what she told him.

"Oh, I'm not searching for anything, Ray," Sally gave her son a reassuring smile. "You don't have to worry about that."

Ray wouldn't not worry, and she knew it full well. She looked down at her youngest son, but Percy had ignored Ray and Sally a long time ago, humming some superhero tune, and eyeballing the tall buildings and fast cars. She was grateful for that.

Ray, despite what his mother said, also looked over his shoulder, but he didn't find anything unusual. He didn't stop, though, and he kept scanning the crowd. Then, a cab stopped in front of them. Sally ushered them in. The cab driver, an old man with greying beard and a pair of glasses covering his eyes, turned his head to look at Sally. He wore a small green hat over his head.

"Where to, ma'am?" he asked, then looked at Ray's cast. "Whoo, boy, did you get that in a baseball competition or somethin'?"

Ray shook his head, eyeing the man warily. This guy felt... weird. His stone half hummed in his hoodie pocket. "Uh... no, sir."

Sally cleared her throat. "Sorry to interrupt, but we're going to East one-hundred-and-fourth and First," she told him.

"Ah, of course! Sorry about that, lass," he said, chuckling as the cab started to move. "I'm gettin' too old for this, and my granddaughter just broke her arm like yer son."

Sally let out a breath. "It's fine, but please go faster," she asked the old man. He raised an eyebrow.

"You're late for somethin', missy?" he asked back, but the cab did move faster. Sally sighed, and watched as Percy laid his head on Ray's lap, starting to doze off.

"No. But it's better an hour early than a second too late," she replied gravely. The old man, noticing this, deciced to stay silent. Ray looked at his mother with a confused expression, but he didn't say anything either.

~0~

The ride to their apartement was in silence. After the Jacksons reached their destination, Sally thanked the driver and paid. They then found someone already standing beside the door, leaning on the wall, and his nose buried in a book. When Percieval noticed them, he closed his book and put it in a suitcase by his side.

"I've been waiting," Percieval said with narrowed eyes. "It seems you have arrived at last, and you defeated my minions. No matter. You shall not leave this place alive!" he said the last part overdramatically. Ray snorted at his best friend. Percieval could be childish when he wants to.

"Cut that 'final boss' crap," Ray said, looking bored. His mother never allowed them to go with anything that had to do with technology (For whatever reason), but he watched some of his classmates play games in class. "I guess we'll be going together, then?" he asked the last bit while looking at his mother.

She nodded sadly."I wish you could go when you both are older, but I guess not." She sighed. "Go pack your things, Ray. And make it quick."

She unlocked the door and Ray ran inside, to the room he and Percy shared. Percieval just sat patiently on the couch, going back to his book. Percy looked at his mother sadly.

"Does Ray really have to go, mom?" he asked with a pout. "Can't he just go after we go to Montauk?"

Sally picked him up and smiled sadly. "I wish that too, Percy." She said, looking at his sea-green eyes that looked so much like his father. "But... no. He has to go now."

Percy looked down. "Okay..." he mumbled, then he suddenly perked up like an idea suddenly struck him. "Then... can I go with him now?"

Sally grimaced. Percy could go with his brother now, but...

Percy suddenly shook his head. "You know what, mom? I'll stay."

Sally gave his son a surprised, but grateful look. "Why?"

He grinned. "Because you'll be lonely here!" he chirped happily. Sally smiled too and nuzzled her nose to Percy's, making him giggle. Percieval didn't notice, too absorbed in his novel.

In his room, Ray packed the things he thought he would need for this camp in a black backpack. He put some extra clothes, his toothbrush, and a book if he would ever get bored. Unlike Percy, Ray didn't have Dyslexia, only ADHD. He gave his things a look-over, then decided that he could still bring something.

"Okay, now what...?" he muttered, looking around the room. His gaze landed to a picture of him, Percy, and their mother. He was about to pick it up, but he realized Percy probably want this too, so he left it.

Then his stone half hummed again, and Ray pulled it out from his hoodie pocket. Ray stared at it for a moment.

'Weird...' he thought, frowning, 'Just what is this thing...?'

After a while, he shook his head and put it inside the backpack.

After a few seconds, Ray stumbled into the living room, a backpack on his back. Percieval snapped his book shut, and looked at Ray with a raised eyebrow. "You ready?"

Ray readjusted his backpack's position. "Ready as I'll ever be, I suppose," he muttered. He then looked at his mother, who was busy nuzzling with Percy, who kept giggling, which, in turn, making Ray smile. Then he realized something.

"Mom," he called out. Sally put Percy down and looked at him. "How do Percieval and I go to this camp?"

Sally frowned. "Well... your... escort... should be here soon. He said he'll handle the transportation. Why don't we wait outside?"

Ray shrugged and looked at Percieval, who shrugged back. "Let's go then." Percieval picked up his suitcase and followed Ray outside. Sally then followed suit, holding Percy's small hand.

They stood on the sidewalk, looking left and right, but nothing was in sight. Ray and Percieval almost decided to just go using a bus, but then a cab driven by a familiar face pulled over. The old man stepped outside and laughed, his eyes wrinkled with age.

"Whoever thought you'll be the ones I'll keep an eye on?" he chuckled. "Must be the Fates... oh well. I'm Eleus."

He then smiled. "I'm a Searcher."

~0~

"So... just who exactly are you?" Percieval asked, frowning. He said what was inside Ray's mind at that moment. After the man(?) known as Eleus introduced himself, Sally bid both of them goodbye, and Percy hugged Ray tight for a few seconds. Percieval just smirked all the time, but Ray didn't miss the look of envy in his grey eyes. Percieval's step-parents didn't like him, and the feeling was entirely mutual, so he would be a wee bit jealous of kids that had parents that loved them. Sally loved him like he was her own son, of course.

"I'm a satyr," Eleus smiled through the rear-view mirror. "You know, those creatures that are half-man half-goat."

Ray looked surprised. "Half-goat? Oh. I thought all this time satyrs are half don-"

"Don't say that name!" Eleus interrupted, eyes narrowed. "Many satyrs will trample you underhoof for such an insult!"

Ray and Percieval shared a look. The latter then looked at the 'satyr's' back with obvious suspicion. "Right... so... we're supposed to trust you that you won't kill us how...?"

Eleus chuckled. "You don't trust your safety around me yet you trust me saying I'm half-goat?" he asked with amusement.

Percieval closed his eyes. "Yes."

Eleus shrugged, but he still smiled. "If that's what you want. And answering your question... you'll just have to wait and see."

Both boys had a look of pure displeasure on their faces, making Eleus laughed again. By Zeus these boys reminded him so much of his own grandkids! He kept chuckling, not noticing the boys' narrowed eyes.

Ray crossed his arms, and looked away. "Hmph. Whatever." He grumbled. Percieval huffed, and he gazed out the window. Eleus smiled. Kids.

"Why don't you two just sleep?" Eleus offered. "I'll wake you up when we've arrived. Sounds like a deal, no?"

The boys responded by glaring at the old 'satyr,' making him laugh again. He'll never get tired of his job!

~0~

Only a few minutes have passed, and those two were already dozing off on the leather seat. Eleus chuckled and focused his attention to the streets. It was almost dusk now, and the streets of Long Island had started to get empty.

The afternoon's atmosphere was lazy for the old satyr, and he yawned. He was contemplating about whether or not to step harder on the gas just to see the two boys get riled up for being woken up from their naps forcefully, but a huge roar snapped him out of his thoughts.

Ray and Percieval jerked upright, eyes wide. "W-what was that?" Ray stammered. Eleus narrowed his eyes, and moved his gaze to the side-view mirror. He cursed in a language the boys surprisingly understood : Ancient Greek. Huh.

"Fasten your seatbelts, boys!" he shouted, then he remembered that this was October. He suddenly grinned. "Ride's about to get spooky!"

Ray and Percieval, although confused and afraid, looked at him strangely. "Huh?" they asked at the same time. Eleus hooted and pressed the gas hard, cackling like a madman. If not for the seatbelts on the seats, the boys could've been thrown around like ragdolls on the back.

"What are you- Holy-!" Ray was cut off because he was squished by Percieval on a tight turn. Percieval was about to apologize, but then it was his turn to get slammed by a wide-eyed Ray in another turn.

"Oof!"

"Ouch!"

"Gah! My arm!"

After a few headbutts, Ray was this close from cursing the cab driver, but then his gaze flitted to the rear-view mirror, and his jaw dropped slightly. Percieval also looked behind, noticing his best friend's stare. He was shocked with awe, too.

"She's pretty, ain't she?" Eleus cackled as he glanced over the rear-view mirror. "Such a shame she's tryin' to kill us!"

Behind them, flying fast to catch up with the cab, was... "A dragon?" Ray whispered, still in awe. Percieval shook his head.

"I don't think so. Look at its legs. Only two," he pointed out. "That's a wyvern!"

Ray gave his best friend a look. "Still the same thing."

Percieval rolled his eyes. "It isn't."

Ray narrowed his eyes. "Nerd."

Still, this dragon- wyvern- whatever was one of the coolest thing they had ever seen. With outer spiky scales as red as flames, and softer looking grey scales on the inside, the beast was indeed beautiful. It flew overhead behind the cab, its wings outstretched, revealing grey-ish blue reptilian wings. The beast had horns extending from its head and moved backward, and with those blue eyes that burned with determination to kill them, it was indeed majestic.

It let out a roar, and sailed past the cab. Ray and Percieval frowned. "What is that dragon/wyvern doing?" they said at the same time. Percieval narrowed his eyes at his best friend, who just rolled his eyes.

Then they heard Eleus curse, and the steering wheel was turned sideways. The beast had landed on its two feet a few feet away in front of the cab, waiting for it to come and be blasted by its fire boiling in its mouth.

They veered off the road, and perhaps Eleus was a better driver than they gave credit for. He drove with evasive manuvers, and extreme presicion, avoiding the beast who turned its head around irritatedly and spit out a fireball. Eleus avoided that too.

Percieval gave a smug look at Ray, who let out an annoyed sigh. "Fine, it's a wyvern, not a dragon," Ray said, giving his best friend an irritated look. "Happy?"

Percieval shrugged. "Not really."

"As much as I love watching you boys bicker like an old couple-" Eleus relished the sight of them recoiling of disgust- "You two need to sit down and fasten your seatbelts! I'll try to lose it!"

The wyvern roared in rage and with a flap of its wings, it flew up again, trailing behind the cab, and sometimes spitting its fire breath at them. At one point, the wyvern had sailed down with its leg positioned like it was trying to grab them, but Eleus had stepped on the brake forcefully and those razor sharp claws missed by a few inches, making Ray and Percieval slam face first to the front seats.

They groaned in pain and the wyvern let out an irritated roar. Eleus chuckled and stepped on the gas pedal again, which in turn crashed the two boys back to their seats. They glared at the old satyr, but he just laughed it off.

Eleus drove the cab like he was driving in a street race, turning around corners without even slowing down, cutting through cars, and heck, Ray and Percieval was pretty sure Eleus drifted on some point (Which was pretty cool).

After minutes of driving like the devil himself was chasing them and making the two boys almost lose their lunch, the cab finally stopped. Eleus was still laughing like it was the greatest experience in his life.

"Hoo, boys! I think we lost it!" he hollered, grinning as he glanced at the green-faced eight-year olds, "Was that fun or what?! We should do that again sometime!"

Ray gulped as he clutched his stomach. Percieval wasn't any better either. "I-I'll pass," Ray whispered hoarsely. Eleus chuckled again, and turned forward.

"Stop being so overdramatic, kids!" he said, stepping outside, "And look! We're here!"

Percieval took a deep breath and scooted outside. He leaned to the side of the car, hoping to make the sickness disappear. Ray dropped to the ground, and yelled, "Land! Oh how I missed you so much!"

This caused Percieval to snicker slightly, then he stood upright when the sickness disappeared completely. He looked at where Eleus was looking at: a cliff.

"So, the camp's over there?" Percieval asked Eleus, who unloaded his suitcase and Ray's backpack from the trunk. At the boy's question, the satyr nodded.

"Aye, that's the place," he answered. "Just walk past there, and you're in the camp's boundaries, which has a ward that prevents monsters from entering. Go over to the big house, and you'll see Mr. D. He's the camp director."

"Thanks," Ray said after he stood up and took his backpack. He looked at Eleus. "Are we going to see you again, Mr. Eleus?"

The satyr shrugged. "Probably not," he answered honestly, "I'll be searching for other demigod kids like you, so I'll be busy. Still, if you're in town and need a cab, just Iris-message me."

The boys gave him a confused look. "Huh? A what?" Percieval asked. Eleus grinned and waved him off.

"You'll find out sooner or later," he said, much to the boys' annoyance.

"Oh, by the way," Ray suddenly said, "Are you really a satyr?"

Eleus smiled. "Now you're asking the right questions," he said, and he pulled his hat off, revealing a pair of goat horns in the middle of his grey hair. He smiled as the boys' eyes widened in amazement.

"See you later, buckos," he said, "Oh, and if I were you, I'll hurry to the camp. That dragon-" he chuckled at Percieval's disapproving scowl- "wyvern could still be around here somewhere. Now be safe, kids."

Ray nodded. "You too."

The satyr smiled and moved again to the driver's seat. Ray and Percieval waved him off as the cab drove into the distance.

But it didn't get far before it turned into a fiery explosion. A roar was heard above them, and the red wyvern dropped to the cab, crushing it. Its blue slts glared at the frozen boys, the flames not bothering it.

"Mr. Eleus..." Ray whispered in horror. The wyvern snarled and flew up, ready to take care of the two demigods.

The boys shared a look. They immediately dropped their things and bolted off. But a pair of eight-year olds couldn't really outrun a giant fire-spitting wyvern.

The wyvern dropped in front of them and growled, mouth billowing with fire. Ray skidded to a halt, and Percieval crashed to him, making them tumble to the ground and into a jumbled mess of limbs. The wyvern was unimpressed, but it didn't shoot them. Yet.

"O-ow," Ray cringed as untangled himself from his friend, who groaned in pain. Ray looked up at the wyvern, who stared right back with narrowed slits. Ray gulped.

"G-good dragon..." he said with a low voice, helping Percieval to his feet, "We'll just... uh... move around you..."

The wyvern snarled, like it was offended, then let out its fire breath. Ray yelped and pushed Percieval out of the way, feeling the heat from being too close with the flames. The grass they were on a few moments ago were turned to ash.

The wyvern crawled over to them, its mouth still billowing with flames. Ray waved his healthy arm above his head furiously.

"W-wait! I'm sorry I called you a dragon!" he tried apologizing, eyes wide, "I meant you're a good wyvern!"

It narrowed its slits, but stopped. Percieval winced as he stood up. "I-I think we should call for help," he whispered as the wyvern eyed them.

Ray glanced at the top of the cliff, which was still pretty far. Then he looked back at the wyvern that stood right in front of them, snarling and snapping its jaws. "How do we do that?" he whispered back.

"Uh... why don't you run up there and call for help, while I stay here to divert its attention?" Percieval offered, which made Ray scowl.

"Not gonna happen," Ray retorted. He then looked at Percieval's leg, or the fact he was putting most of his weight on his right leg, exactly. "I think you have a broken leg, so you'll be the one calling for help, and I'll be the diversion."

Percieval scowled back. "Which is precisely why I said you should go get help," he argued, "Your legs are still relatively fine, so you can get help from camp faster than I could!"

Ray glowered. "Getting help wouldn't matter if we found you already dead!" he argued back, glaring.

The wyvern just stared as the two demigods bickered back and forth, slowly getting confused. They... did realize it was still there, didn't they? The beast shook its head, then roared, snapping the eight-year olds from their debate.

Percieval gritted his teeth and shoved Ray harshly. "Just go!" he snapped. "I'll be the diversion and you go get help! Now GO!"

Ray was about to argue back, but a wall of flame divided him from Percieval, and the wyvern glared at him. Ray just said something so improper for an eight-year old his mother would wash his mouth with soda, then he ran off. Percieval nodded approvingly then looked back at the wyvern, throwing a small rock to its head.

The wyvern growled, irritated, then charged at Percieval, who slowly retreated downhill. After Ray was halfway from the top of the hill, he glanced back, and saw Percieval muttered something under his breath, then he slowly put all of his weight on both of his legs. He pulled something from his pocket, something long, metallic, and shiny.

Ray's eyes widened. 'A knife? Percieval's got a knife?!' he thought, dumbfounded. He grinned, 'Cool!'

Percieval evaded a bite from the wyvern's jaw, then he slashed at its head. The wyvern roared, more in annoyance than hurt, then it flapped its wings and flew up. Ray turned around and continued running up the hill, but he heard something was coming from behind him.

He looked over his shoulder, and true enough, a fireball was heading straight right at him. He yelped and ducked out of the way, but he jumped a second too late. A stabbing pain coursed through his leg, and he yelled out in pain.

Percieval's head snapped at his friend's shout of distress. "Jackson!" he yelled. He was about to run to him, but the wyvern dropped in front of him, growling, mouth opened and revealing a pointy set of teeth, and the billowing flames that rose from its throat. Percieval gritted his teeth.

The wyvern let out its fire breath, and if not for the arrow that suddenly embedded itself in its left eye, Percieval could've been roasted alive. The wyvern roared in pain and flew up.

Percieval heard the sound of a trumpet- a war horn- from uphill, and he saw a centaur holding a bow, aided with older teens around it, all carrying bows and aimed at the wyvern, who charged another flame breath.

"Fire!" the centaur yelled, and arrows rained on the wyvern. Percieval was surprised. The voice was familiar...

Still though, arrows weren't enought to rival the flames of a wyvern.

The fireball launched from the wyvern's jaw turned all the arrows to ash, and much to everyone's horror, it sailed right at the eight-year old clutching his leg in pain.

"Jackson!" Percieval yelled with wide eyes. Ray, hearing this, looked up from his position and saw the fireball coming at him.

Ray tried to crawl away, but to no avail, the fireball was bigger than before. The archers from uphill rushed down to the injured demigod, with the centaur in the lead, all looking frantic.

'No!' Ray thought, purple eyes filled with dread at the sight of the fireball just a few feet away from his head. 'Mom...! Percy...!'

As if he was controlled by a higher power, Ray suddenly pulled out his black stone half with his healthy hand and held it above him. Almost immediately, energy flowed from the stone, and soon he was encased in a white ethereal dome.

The fireball hit the barrier, and the area Ray was in bursted in a fiery explosion. The centaur and the archers skidded to a halt, all of their eyes wide. Percieval dropped to his knees, the silver dagger slipped from his fingers as he stared, jaws agaped at his best friend's possible death.

But then, he heard a soft hum, like that from the movies he watched. A hum of energy.

Percieval watched with awe, like the archers and the centaur, as the flames turned to black, and absorbed by the stone clutched in Ray's hand along with the dome. The said demigod gritted his teeth, and with a yell, he thrusted the stone at the wyvern's direction, who was stunned.

Black beams of flames bursted from the stone, right to the shocked wyvern. Because of that, it didn't have enough time to evade, and soon engulfed by it. The wyvern's agonised and pained roars were barely heard over the crackle of flames.

Soon, the flames dissipated, and Ray fell to the ground, unmoving. Right at the same moment, the wyvern fell and crashed to the ground.

This caused others to snap from their stunned condition. Percieval picked up his silver dagger and sprinted to the downed wyrm, eyes set with determination. The centaur ordered some of its archers to check up on Ray and the rest to assist Percieval. The centaur itself went with the ones checking over Ray.

Up close, Percieval could see how bad the wyvern was hurt, and if it did't try to kill him and his friend and killed the kind old satyr an hour ago, he would felt sorry. But it did, so Percieval didn't.

The beast laid on the ground on its back, its wings were no more, burned to ash, and the once bright red scales were scorched, showing the muscles underneath. The wyvern's blue slits were wide, still shocked over the fact that it was defeated by flames, the very energy that flowed right along its bloodstream!

It eyed the small, young demigod holding a glinting silver dagger, and it closed it eyes. Percieval wasted no time, stabbing where he guessed its heart may be and watched as the great beast dissolved into dust.

Percieval let out a breath and fell on his behind, the adrenaline leaving his body. Then his head snapped up.

"Jackson!" he yelled running past the shocked archers. They couldn't believe a pair of eight-year olds with zero training could actually defeat and kill a wyvern. Percieval paid them no heed, however, and continued to run at where the rest of the archers and the centaur huddled together.

He shoved past them, and was relieved to find his best friend was breathing. Ray was just unconscious from using too much energy. And then Percieval heard a whisper.

"What... who's child are you exactly, child...?" the centaur mumbled, and Percieval looked at him. He looked familiar...

Percieval gasped. "Mr. Brunner?!" he yelled, eyes wide. The history teacher blinked, then he turned at Percieval with a small amount of surprise.

"Mr. Schneider," he said, smiling sadly, "I knew you were coming today but I didn't expect Mr. Jackson to come with you."

Percieval shook his head. "I didn't either. It was a last minute thing. His mom asked him to come."

Mr. Brunner nodded, now looking at Ray. He then turned to a nearby archer. "How is he?"

"He's fine, Chiron," the archer said, "Just too tired, I would guess."

Mr. Brunner sighed in relief. "Thank the gods," he muttered, then looked at all the archers, "Well what are you waiting for? Bring him to the infirmary!"

After the archers scrambled, carrying Ray on a stretcher and left Percieval alone with Mr. Brunner, the demigod looked at his history teacher. "Chiron?" he asked, frowing.

Mr. Brunner sighed. "We have a lot to talk about, my boy," he then looked around, like he was searching for something. "Where is Eleus?"

Percieval looked down, and pointed to a crushed, burned out cab on the street below. Mr. Brunner took a deep breath.

"Such a shame... he was a good satyr..." he said, rubbing his face, "By the gods how do I tell his family...?"

"Mr. Brunner?" Percieval asked, gaining his teacher's attention. "Are you a centaur?"

Mr. Brunner looked down, before he picked up Percieval and put him on his back. "We have a lot to talk about, indeed, child."

~0~

Whew, I hope that's longer than usual. My God this chapter is tiring. Anywho... let's just pretend that the Skeleton War memes existed in 1997. And that wyvern... if you don't know, it was based from Odahviing. Oh, and Eleus was also an OC, I got his name from Aeleus, aka Lexaeus.

Also, if any of you are wondering, that move Ray did with his stone half was inspired from that scene in Avengers Infinity War in planet Titan when Tony shot missiles at Thanos but he absorbed the flames from the explosion and shoot iy back.

By the way, are you guys surprised that Thabnos is the son of Eros? I mean, the god of love? Seriously?

Well, please favorite, follow, and don't forget, please review!

FOR SKYRIM! FOR AKATOSH! FOR THE DIVINE SWEET ROLLS!

-Yami Tensei