The Phantom in Alredo Chronicles: Attack on Titan

The world Ariel originally lived in was the world of Pokémon. The difference from other Pokémon worlds is that the people in it are not trainers, but they can turn into a specific Pokémon! Enter Erin! When the World Tree is attacked by waves of ultimate alien beasts, energy is in short supply. Ariel will go to another dimension to collect energy! I just don't think it's a good idea... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.