Correction, it's not an Undead but a Worm (Gryllus Worm to be precise).
I don't know how to tag for him, so I just add the serie he comes from.

The joke is that the Gryllus Worm was also played by Tomohisa Yuge, who is the actor who played Kiyojiro Bandou, the store owner of the cafe Gaim and everyone always go to in the show, incase anyone is wonder.

On a sidenote he also played Goro-chan from Ryuki.