A reaper kind of character, who also happens to be a mage. (If this doesn't make sense, I'm going to explain. Mercia was born from a family of mages, but died, and decided to become a volunteer reaper. This is going to be canon, I guess.)
Since she is dead (technically she is dead, though she can still access the overworld because of her job,) she has no age. She was 16 years old when she died, so she still looks 16.

A/N: I'm really proud of the eyes on this, I might make it a style.