Species: Unknown, but possibly a shadow creature of Fiddel Redrum's species.
Basic information: A young, rambunctious rabbit shadow creature with a thirst for adventure, Yuii enjoys a good exploring in the woods especially, as she enjoys satiating her curiosity for the unknown. She's known to end up in places where she isn't meant to be, and that has gotten her into trouble many times. This doesn't stop her, however, and she continues to walk around random locations. She enjoys watching animals, and is very curious about them, often trying - and failing - to approach them.