This is from Episode 9 where Meg only has seven months to live and found this girl from a dying tree as its spirit during an investigation o...

She's one of the Seven Mages, also known as the Witch of Words. Since she can't use magic at all due to the fact she's half-spir...

She's a human spirit of the Lapis' sacred tree that watches over its citizens for a long time. She cannot be seen by normal people b...