Doku and Kuro (独 and 黒) are two silent skull-shaped floating creatures which follow De-chan. Despite belonging to De-chan, Doku and Kuro often take Rock-chan's side whenever Rock-chan and De-chan play to help look after her. The two also act as Rock-chan's guardians when De-chan is away.
They looks like a human skull. They are similar to the two skull of Dead Master. They have green glowing eyes and mouth. Unlike the two skull of Dead Master, Doku and Kuro aren't harmful. If you will notice there size, Doku and Kuro are too small.
- Floating - They can float and they are always following De-chan.