Cynthia (Japanese: シロナ Shirona) is an archeologist who is also the Champion of the Sinnoh region's Pokémon League in Pokémon Diamond, Pearl, Platinum, Brilliant Diamond, and Shining Pearl. She often goes to the Gym to work on her physique to get into shape because her ideal is that being in proper fit helps you focus more in battle.(Obviously Cynthia is not buff in the series but this is a fan- made idea that I came up with)

Pokémon Champion of Sinnoh with a muscularly body!

Her childhood was living in a small village in East Blue called Cocoyasi Village. A little later, her village got raided by some pirates called the Arlong the pirates. After then it was a living hell for her village was in despair. So she decided to protect her loved at the village and went to joining the pirates after was forced to draw world maps for them. Couple more years after Luffy decided to help Nami and took down the pirates which made her join being a navigator for their crew.

Navigator of the Strawhat ship & gold digger

Yamato is the son of Kaido. Born as Kaidou's daughter and groomed from a young age to be his heir, Yamato instead developed a profound admiration for the legendary samurai Kozuki Oden. After Oden's death, Yamato decided to become like him, impersonating him and adopting his mannerisms.  Yamato befriended Portgas D. Ace during his visit to Wano Country, and after learning of Ace's death waited for the arrival of his sworn brother, Monkey D.Luffy, later as time come Kaido was put down by Luffy.

Kozuki oden follower to realize his dreams

He acts as a first year in Jujstu High where they train sorcery to use their abilities at there max potential so they can learn on how to exorcise a curse spirt. His goal is he wants to exorcise the curse spirit that is causing his sister Tsumiki to be in the coma. He is not only first year amongst his classmates. he is also brought by Itadori Yuji and Nobara Kujisaki who they hang with each other as a trio. 

Depressing but honest man 

Her first ever Pokémon was a Gible since she was a child. During her childhood of growing up she trained and played with her Garchomp to try and develop some sort of bond between them until Garchomp became her ace. Eventually she beats the Pokémon championships and had developed a strong bond with her team that people gave her a new title "The Queen of Sinnoh". Now she has a hobbies which is a archeologist to summarize she explores the lore of Pokemon's history. 