Manesuru no Oni

Manesuru no Oni was an expert at mimicking any people encountering it. Whatever the number of the party happening onto it, the Manesuru no Oni matches it with equal number of replicas, which would take the shadowy form of its opponent. The samurai were then compelled to fight their exact match.

The oni copied techniques, feats, voice and physical features of anyone it encountered. Some said there is only one Manesuru no Oni, splitting into enough parts to match the party, others that there was a multitude of Manesuru.