One piece: Ragnar D. Sabre

He kept swinging his sword, blowing the sand below his feet with each small step, The saber in his hand glinted in the daytime sun.

He slowly stepped back and turned around, sweeping his sword like a blur, only to cut nothing. He again turned around, doing a stab motion, This time also cutting nothing.

He sighed as he sheathed his sword in the strap attached to his belt. He went to a nearby tree to rest in the shade.

He was Ragnar, Ragnar D. Sabre. Someone who had Reincarnated into this world, It was Three years ago, When this body was still only a pubescent child, now he is 15. He Reincarnated into an island in the south blue known as Shigeru island

'Three long years have passed since I started his conquest, conquest.' He realised, Remembering his first few days in this cruel world.

Starving with hunger, Malnourished, Weak and pitiful, Those were the things that described the Ragnar he was Three years ago. Ragnar chuckled, it was only a miracle that he survived.

In this world, His saber was his most prized possession. A Meito, An Ō Wazamono. It's name was Sigyn. Named after A Godess of north mythology, The Godess of loyalty.

When Ragnar just came to this world, he met an old man, a man with extraordinary wisdom about this world, Hus name was Hisui, After Ragnar met him, He took care of the man for a year. The man was diagnosed with a deathly illness and he soon died after but before he left Ragnar with his house and sigyn.

Hisui was a famous pirate in the new world, with a bounty of over a billion, it was only a stroke of fate for Ragnar to meet Hisui. Ragnar asked Hisui to teach him haki and Hisui agreed to do so if Ragnar manages to learn basic armament in six months or less, Ragnar learnt armament in just a couple of weeks and managed to impress Hisui.

Seeing Ragnar's talent Hisui taught Ragnar everything he knew, from basic knowledge on geography and navigation to devil fruits, swordsmanship and advanced haki.

Ragnar started considering the old man as his own father, someone he never had in his both lives. When Hisui died, Ragnar took it as his own goal to complete Hisui's old dream, The dream to someday be recognised as the greatest pirate to ever live.