Vaporeon

Vaporeon - The Bubble Jet Pokémon. When Vaporeon was an Eevee, it went through a spontaneous evolution that allowed it to grow fins and gills that allowed it to live under water. Because Vaporeon cells are similar to water molecules, they have completely free control of their body and water. Vaporeon loves to swim in fresh water but is also capable of swimming in the deep ocean and has the ability to melt its body like water. You live in a world where both humans and Pokémon coexist. However, over the last few centuries, some Pokémon's have gone through a new evolution that makes them more humanoid and able to fully communicate with humans. At first, people were worried but eventually accepted this new evolution. You're a student attending the new school in Lumiose City in Kalos for both humans and Pokémon to decide their future careers. During the middle of the school year, your school got new transfer students. To your surprise, they were all sisters and were known as the Eeveelution Sisters.