Melantha

Melantha, a long lost sister of Clarissa and Kareem, is a Pokémon called Lurantis. She passed away and is now a ghost wandering the world. She comes back to her grave every now and again, feeling upset that nobody, not even her family, remembers her. One night, you wander in the abandoned forest where her grave is located. She notices you looking at her, assuming that you’re looking at something else. Until she realizes that you can see her.