Hello! A reader on requested that I show Six and Rex's relationship from the very beginning. So this is my rendition of things. Yes, it is posted under romance/family still because I will be ending it when Rex turns eighteen, the age he is in "A Little Spirit" and in "Baby Spirit". I do not own Generator Rex MOA does. If I DID own Generator Rex, it would go like this:

Since they had no idea when Rex's birthday was they allowed him to choose the date. Naturally he chose the day that Six found him, which coincidentally happened to be the agent's birthday. Rex thought that was pretty cool, sharing a birthday with a ninja. Six could only groan and shake his head in a combination of amusement and exasperation.

Their birthday was in a week and Rex had only ever asked for one thing… He wanted Six to find his parents, something he had also wanted for Christmas.

Six had been unable to do so… He identified Rex's parents as Rafael and Violeta Salazar. They were globetrotting scientists. Their eldest son, Cesar, was born in Mumbai, India. Rex was born in Geneva, Switzerland. There was no record of any of the Salazars aside from Rex surviving the event…

Six was fairly certain that they are dead. He just didn't have the heart to tell the hopeful ten-year-old that.

"How do you break it to a "eleven"-year-old on his birthday that his parents may be dead?" Six asked out of the blue.

The agent leaned against the wall and watched Holiday buzz around her lab. The question was rhetorical so he wasn't really expecting an answer. Neither of them noticed Rex heading their way… He was lonely and bored.

"Doctors Violeta and Rafael Salazar… They ran the nanite project along with Gabriel Rylander, Van Kleiss, Peter Meechum, their eldest son, Cesar, amongst others. No one from that place was ever recovered. It was an explosion… It's a miracle that Rex survived but miracles are rare," Holiday, said.

Six frowned. Holiday was agreeing with him in a roundabout way that it was possible that Rex's family was dead. He wasn't even aware that the preoccupied doctor had listened to him at all…

The agent sighed as he remembered his own family and wondered just how much more painful their deaths would've been to him if he had not known what had really happened…

Rex kept a close eye on the older man and though his facial features hadn't changed beyond that frown he had a feeling that Six knew what he was going through. The little boy found it kind of depressing that the one person who would understand him the coldest and most intimidating person in Providence. It wasn't like he could just go to Six for emotional support now was it?

"I'm not giving up until I can give Rex the answers that he is looking for."

Rex smiled at that, 'Maybe Six isn't so bad…'

"Six. You're losing sleep over this. This obsession isn't healthy and as much as I hate to say it, the Salazars likely died in the event. There maybe nothing for you to find and no answers for Rex."

The two adults turned when the heard a whimper escape Rex's lips from the doorway. Tears streamed down the little boy's face.

"Rex…" Six muttered as he took a step closer.

Rex turned on his heel and ran away. Six glared at Holiday and took off after Rex. The agent knew that it was irrational to blame the doctor but he couldn't help but feel protective of the little boy.

'Probably because I was orphaned around his age…' Six reasoned.

The agent searched high and low for the youngster, failing to find him no matter where he looked. Sirens went off…

Six swore and raced to the hangar. He boarded his jump jet and set off to the "battlefield" in downtown Pittsburg where an incurable tiger-like EVO was terrorizing the town.

Rex was there, fighting the EVO on his own much to the agent's dismay… The kid did his best but there was only so much his underdeveloped smack hands could do in their "prototype" stage.

"Rex!" The agent cried out.

Six watched in horror as Rex was flung into a building like a rag doll. The massive EVO snarled and stalked his battered, bruised, and broken prey. Six sprung into action and just barely managed to fend on off the EVO as it lunged towards the unconscious boy. The agent slashed the EVO deeply across the nose before being batted away and tossed around like a catnip mouse.

The tiger EVO stalked towards him slowly as though to prolong his suffering. The agent slowly stood once the world stopped spinning and rammed his katana into the beast's eye. The EVO roared and reared back, enabling Six to get away.

With one eye lost and blood seeping into the other, the tiger was blinded and had to rely on its already depreciated sense of smell. It lingered on the bit of blood Six had left behind when the back of his head collided with the cement before turning its attention back to Rex.

Rex opened his eyes and whimpered, crawling away in fear. The little boy closed his eyes and began to say his prayers as the beast raised a massive paw filled with gleaming claws.

Rex heard a grunt of pain but felt none of his own. The youngster opened his eye and stared up in awe, trembling in fear. Six wasn't a bad person. Not by a long shot… But Rex never imagined that he would willingly put his life on the line for him.

Six fell to one knee, clutching his chest and wheezing. Rex ran to his protector and saw that blood was seeping out from his shirt and dripping from his hand. There was a ring of acid green around each deep wound. Six crumpled to the ground, still very much awake an in excruciating pain.

"Poison!" Rex cried out in surprise.

He pressed the ear bud that Six had given him a year ago and contacted Providence.

The tiger circled back to finish the job. Rex picked up a rock and threw it at the beast.

"Over here you ugly minino! Come get me! Come on! Spicy Latin food right here!" Rex shouted as he threw a couple more rocks and ran.

He drew the EVO away from the injured agent and pressed the button again.

"Help! Six is down! He's been poisoned!" Rex cried.

"Alright little partner. I'm on my way," Callan replied.

The EVO snapped blindly at Rex who glared up at it out of defiance, "If Six dies I'll kill you!"

Rex formed his smack hands again. The build is fueled by his emotions and is stronger than they were before. Tears streamed down his face as he wildly attacked the EVO in a blind rage.

Six sighed at Rex's lack of skill and strategy but he couldn't help but feel proud of the boy's courage and determination. The boy manages to fend off the tiger long enough for back up to come in the form of Callan and his grunts. Six passes out from the pain and the poison just as they are placing him on the stretcher and carrying him off towards the Keep.

It took a great deal of firepower to kill the retched creature. Rex watched it die. It was his first experience with death that he could remember. He wasn't sure how to feel… The little Latino pulled the agent's katana from the beast's eye. A grunt tried to take it from him but the boy refused to let go of it.

"No! Six will need it when he wakes up!" Rex cried.

The grunt backed off, not entirely trusting that this little EVO was on their side. Everyone said that he was the cure but he was still a dangerous creature. The grunt nodded towards the Keep and walked away. Rex hung his head in shame, knowing that the grunt was disgusted by him and slowly followed.

The little boy sighed… There weren't very many nice people in his life. There was Holiday who sometimes treated him like an experiment. There was White who thought he was a brainless monster that should be turned into a weapon. Then there were Six and Callan who were distant and dedicated to Providence.

They were the ones who ran around killing EVOs who were once humans or animals or plants, and yet they were the best of them…

'How messed up is that?!' Rex wondered as he boarded the Keep.

The clean up crew was sent out to torch the tiger EVO's remains. Six was to be operated on immediately. The prognosis was grim…

Holiday, despite her numerous claims of not being a medical doctor, assisted in the operation. She had developed feelings towards the cold and unresponsive man and wished to be kept updated on his condition. What better way than to assist in sewing him back together?

Rex, on the other hand, was forced to wait outside. He cried himself to sleep on the floor with the bloody katana still clutched firmly in his hands.

Six didn't awake until a full week later… He groaned. Everything hurt. His nerves felt as though they were on fire… He was burning up. The older man reluctantly opened his eyes; for fear that he was actually in Hell being clung to by the devil in octopus form.

He looked down and saw the source of his discomfort…

Rex.

Rex was curled up next to him in his hospital bed; sound asleep with his head on his shoulder. The agent frowned, wondering what the hell possessed the boy to cling to him like this. Six looked over as the doors swished open, revealing Dr. Holiday.

She gave the uncomfortable man an amused smirk; "He hasn't left your side since you came out of surgery a week ago."

The agent raised an eyebrow and croaked, "Why the hell would he do that?"

"Because you're my best friend, dumby," Rex muttered, half asleep.

Six frowned at that but didn't say anything. He found it kind of sad that the little boy considered him his best friend…

"Water," the older man croaked.

Rex sat up and grabbed a glass of ice water. The agent took it in small sips so as not to grow nauseated. He winced as he sat up. Rex never left his side, not even attempting to leave the bed. He just kept staring at Six as though he had to convince himself that the older man was actually awake.

"I'm fine," Six deadpanned.

Holiday fluffed up his pillows so he could lie back on them in a reclined position more comfortably.

Rex swallowed a lump that had formed in his throat, "I was scared that I would lose another important person in my life."

The agent gave him a small smirk and weakly patted his head, "I'm not going anywhere."

"Come on Rex. Six needs to rest. You can see him in the morning," Holiday said, dragging the boy away.

Rex struggled, "Why can't I stay?"

"Because I'm his doctor and I said no. Now move!"

Rex hung his head and reluctantly left his guardian's side…

Six raised an eyebrow, "Don't you think that was a little harsh?"

"You're the one who still treats him like a weapon."

Six frowned, trying to recall a time where he treated the little boy as though he were anything less than human… He shrugged it off, much too tired to think straight despite having been in a weeklong coma.

He was released and assigned to desk duty a couple of days later. Six was less than trilled… He was more of a field agent than a paper pusher. Rex was there when he exited the infirmary.

Six took a deep breath, "Rex… We need to talk."

The young EVO stiffened, "That's never good…"

"No. I suppose not," Six put his hands in his pockets, an old nervous habit of his, "I adopted you."

"What?! Why?! Are you giving up on finding my parents?!" Rex demanded in a panic.

"No… The state was threatening to take you away and place you in an orphanage since you didn't have a legal guardian."

"Really?"

Six nodded.

"I guess that's okay… I like you and all and if my parents find me then maybe we can visit from time to time so you don't get too lonely."

Six frowned and tried to remember the last time he felt lonely… He decided that it was roughly a year ago when One's mind started to succumb to the nanite sickness. One was the only person he cared for and the only one who cared about him… It was only natural to feel a little lonely after that…

"Do you ever feel lonely?" Six asked out of the blue.

Rex shrugged, "Yeah. But it goes away with I'm with you… Not even Holiday can do that and she likes me better."

Six sighed, "I like you just fine. I'm just not used to people."

"Six… My parents are dead, aren't they?"

The agent hesitated…

"Rex… It certainly seems that way. I'm sorry. I can't find any proof that they're alive. No matter what, I will always take care of you."

Rex glared up at the agent through his tears, "I don't want you! I want my parents! You're lying! You're just trying to take me away from them and use me as a weapon like White! I hate you!"

Rex ran way crying. Six stared after him, wide-eyed and in shock at how much the boy's anger hurt him. If Six had a heart he would've sworn that it was breaking just now…

'But why then does it hurt…' Six pondered as he ran after the boy, following him to the hangar.

Rex had one of his builds out much to his chagrin. It was his boogie pack, a large jet pack on his back that enabled him to fly. The boy turned to him and glared. Six sighed, but kept his distance, afraid that he would flee.

"You can hate me all you want but it won't make you feel better and it certainly won't make our lives easier since I have to train you. You're my partner, Rex, not a weapon, and I will always look after you," Six said.

Rex sniffled and let lose a sob, "I'm sorry I said I hated you. I don't."

Six sighed, "I know."

The agent nearly jumped out of his skin as the little Latino boy put away his build and hugged him tightly around his waist. The older man stunned them both by wrapping an arm around the boy's shoulders in a comforting gesture.

"So… Since you're my temporary guardian… Want to play video games?" Rex asked, having returned to his normal carefree ball of energy.

Six opened his mouth to protest but it died on his lips…

"Sure."

And thus, Rex's first birthday was spent in the infirmary. Not that the boy was complaining seeing as how his best friend pulled through… Rex now had a guardian and was beginning to feel a little less lonely each day thanks to Six.

I have NO idea where Cesar was born. It doesn't say on Generator Rex Wikia. I just saw "The Best Exotic Marigold Hotel" and totally fell in love with the idea of Cesar being born someplace exotic and chaotic like India.