Talk:H Episode 38: Final Battle! Specter of Darkness Wasteland, O-Yamigedo!!/@comment-3974145-20151226001249/@comment-25600444-20151226202730

Maybe it's because the Omni Lord energy takes on the appearance of it's user(s) and Tenbu being nibbled on for much longer resulted in it taking on Tenbu's appearance.

That's my guess.