Kyle a common boy who got adopted to the Dadan's Mountain Bandit Group who was found by Ace when he was treasure hunting the Scraps of Gray Terminal Shores where on the same day he met Sabo. Kyle is a transmigraotor who was originally Transmigrated to a Butcher Karl in the North of Westeros in Wintertown. He gained the ability to travel to different worlds which is One Piece World and store non living Items and Dead Persons which is preserved as of now.
During each travel he gains a tiny amount of Strength and Senses enhanced, his first visit was in the Gray Terminal at the age of 9 where he met Ace who was chased by the Adults. Kyle helped Ace hide and then he learned about the One Piece World. Kyle said he was washed out from Shipwreck and said nowhere to go and on the same day they met Sabo who was a runaay. With that Ace took Kyle to Dadan where Dadan refused to have another Brat. Meanwhile Sabo did not trust the others to stay with Ace.
But Kyle does cooking, cleaning and Butchering meat, So Dadan took him for free Labour. Then Later Ace and Kyle met with Sabo and they steal items and salvage scraps from the Gray Terminal. Kyle then went back to Game of Thrones world where the Time did not change, while for the first time he exercised his ambitions of ruling the world.
A Year has passed Kyle in Game of Thrones world woke up he had a hectic day at the One Piece World completing all the Chores for Dadan Bandits, and Salvaging Gray Terminal for Scarp Metals to make money and get a topquality Long Sword from a Blacksmith. Metal Sword is a huge deal in Game of Thrones world especially for a boy of 10 years old.
He intend to join the Winterfell Castle's Guard Troops. Karl after hearing his son's intentions of one day becoming a Knight, he wishes to support through his connections as he sells meat to Castle, he intend to use his Connections with the Steward of Winterfell Lord Vayon Poole. Kyle also has given a quite an impression as the strong boy for his age and smarter than most kids.
Karl " Kyle, Lord Poole has recommended you to Ser Rodrick Cassel to take you as the squire or if not atleast to train for Guard duty at Castle. Do your best and dont squander it. Follow the each and every word of the Lord. " Karl gave his advice to Kyle, Kyle just nodded. He did not want to squander the chance due to his Carelessness.
Kyle is painfully aware that he is not like monsters of One Piece World. His body despite becoming strong, he is still a normal Human Category, Ace and Sabo are far stronger than ordinary adults. Kyle has never won a single spar with them. And he was never able to eat the amount of food like they eat. He is still on the same scale of Game of Thrones human category.
Only way for him to become stronger is consistence and training and taking each battle as his final battle and getting progress on his skills. The Guard who had been already notified and knew about Karl and Kyle, he allowed them to the Training Yards. There were the Old Man in Armour who is slightly fat and had mutton chop Beard.
Among them stood at the front were Robb Stark the heir to the Winterfell, beside him was Theon Greyjoy who has been taken as ward of Lord Eddard Stark, the Warden of the North and at the other side stood one of the Protoganist of the world with both the wolf and the Dragon Blood Jon Snow. They had their TV Show Actor's young face along with the several other Boys who were training.
Kyle was tall and bulky for his age by a slight margin. Rodrik saw the boy, and he was impressed by the sharp eyes and ambition that the boy showed. Karl " Lord Ser, thank you for allowing my son to try out. " Rodrik " Not yet, you may go for now. I would decide after your son has been tested. " Karl with nervousness of a parent who sent their kid for entrance exam walked away.
Kyle stayed sharp and did not flinch at Rodrik's Gaze. He knew that first impression matters. Rodrik " Run around the training yard until your legs give out. Now go!! " Kyle as as soon as he heard the command started running around without any questions asked. Rodrik meanwhile started teaching the lesson.
Kyle during his run from Grey Terminal has enough experience in running away. He ran in a fast pace. But not at his fastest pace, He was far faster than boys of his age. He ran around 10 laps in just 15 mins which is around 1000 m in Circumference. He still did not slowdown. Rodrik was impressed by Kyle. Robb, Theon and Jon despite their Sword Stance training they too had their eye on the butcher boy and made two people in awe and one jealous.
He after 26th lap got himself tired but still ran without giving up. He ran more and more laps, Rodrik continued trainining the boys before him. He had thought about calling the boy at the 18th lap but he wanted to see the limit of the boy. Kyle followed the order he was given ran until his legs were giving out. Kyle knew full well that once his mind wavered from the goal, he would loose the chance to raise in both the worlds once and for all.
As the giving up mentality would destroy his fighting spirit and Haki's power in One Piece world where Crocodile and Gecko Moria were the best example. They regressed too much in power that they were defeated by Luffy before Time Skip. Kyle ran 51 laps and he was practically floating, his heart was beating like a machine Gun fire, his body soaked in Sweat despite the Cold North.
His Thighs, Calves and feet were burning in fatigue and pain. His eyes lost focus and vision blurred in heat. By the time all the boys including Rodrik were watching the boy in awe and shock. Kyle was on the brink of collapse, Rodrik wanted to stop the boy but he felt that he should not stop the kid. Kyle ran slowly as he does not posses anymore strength. His legs gave put and he fell to the ground.
The Guards and the boys ran upto him. Robb " Ser Rodrik, this is too much you should have stopped him. " Rodrik looked at Kyle with new found respect. He did exactly as he was told, He ran until his legs gave out. Rodrik " Take the boy to Maester Luwin. "