This is Layla. Layla's mom was killed in a house fire that was set up. So in order to get revenge, Layla becomes a ghost every October to better search for her mother's killer. Layla can only be seen as a ghost if she wears bright colors (which she hates)
Layla as a human
Layla as a ghost
(I don't have a backstory for the lil ghost so yea)