>>529820219
>Maria is much more quiet, refined, and melancholic than Amy.
Not really, Maria is very energetic herself, and that lively spirit contrasts both Shadow's personality and her own illness.

Maria is weak in body, strong in spirit, and she's the type of girl to run up and hug Shadow and drag him around to do something fun, just like Amy does with Sonic. It's just that the narrative SURROUNDING Maria is very somber and melancholic, painting her own energetic nature in a depressing light.