Board Thread:General Discussion/@comment-8986886-20130531212713/@comment-1387259-20130602214954

Rusaburō Enkōgawa (Enryu) - in its released state Daichimaru "transforms into a pair of large black fists with magenta outlining. The two fists are attached to a large chain which corresponds to each of his hands."

You might also want to look through the Bakkoto, but I'm not certain.

EDIT: Found one - Shiragiri.