Saechika's Ultimate Despicable Force of Psychotic Murderers
The "Thousand Man" was an underling of Saechika and a member of Saechika's Ultimate Despicable Force of Psychotic Murderers.
The "Thousand Man" seems to be a thrill killer, seen in his almost childish personality and gleeful face as he attacked Toki.
In the fight against Toki, he easily killed his comrades. However, he was killed by Toki, without even a corpse.