Antagonist.

A pale, shapeshifting succubus. She, along with her family, are tied to many events transpiring in the story. She is not seen with her family often, as she spends most of her time in the human world. Among her own kind, she is dutiful, loyal and maintains a facade, like a mask. Privately, she hides the pain of loneliness, having only one real friend, whom she would give anything reconnect with again. She hides this fact from the rest of the world, lest anyone see it as a weakness.

Chara to me would have a british accent. Also, accents are required due to her being a shapeshifter needing to become other people herself. Being able to speak multiple languages are a plus, but not mandatory.