New World With You (One Piece Crossover)

Background

Ariella Pendragon is the Goddaughter of Professor Augustine Sycamore and half-sister to Steven Stone. Her hair is short-scarlet curl at the end and rare amethyst eyes. Ever since when she was a young girl, Ariella always travels with Steven because she wanted to explore and discover the mysteries of Pokemon. Steven wanted to take Ariella along because she's an intelligent girl at a very young age as her dream is to help Pokemon who needed their help. She happens to gain an empath ability to feel Pokemon's emotion and it worried her family. Being an empath would bring Ariella in danger especially when a group of dark organizations such as Team Plasma, Team Galactic, Team Magma, Team Aqua and Team Rocket are going to kidnap and use her as a leverage to control the Pokemon.

Steven and Professor Sycamore train Ariella to learn to control her empath powers so no one would know she obtains it or feeling overwhelmed by their emotions. No one knows where Ariella's power is coming from since none of her family members inherit this power before.

Greninja is the very first Pokemon Ariella was given by her Uncle Sycamore when he was a pre-evolve form of Froakie. He never wanted to get inside of the Pokemon ball unless Ariella called him because boys are going to take advantage of her obliviousness. He always stayed Ariella by her side and beat anyone whoever dares to harass or flirts her.

He's loyal to his family and friends and taking the risk without any hesitation. Greninja prioritizes Ariella first before himself due to her rare empath abilities. He always overprotective towards Ariella and never letting her out of his sight.