The spirit of the witch in Ashe's Necklace. Every October (And random times throughout the year), she gains enough energy to take over for a while. Ashe can avoid this by not wearing the necklace, but the witch always seems to leave Ashe in a better state than when she started. Nero the Chao takes the form of a cat to act as her familiar. They aren't possessed, he just thinks it's fun.
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