Armand - not friendly with, not really an enemy though. Kenpachi mostly has very little respect for the man. Knows that he has to answer anything asked truthfully.
Sho Minamimoto - Met during second shift of day 41, challenged him to a fight to the death and was thoroughly confused by his crazy moon talk. They each got a hit in against the other before the nurses pulled them apart. He wants a rematch.
HK - Met during lunch of day 41. Feels a special kinship with.
Schuldig - Spoken with on the boards only. Agreeing to a potential partnership where Schuldig points out the people worth fighting while Kenpachi keeps Schuldig alive and acts as muscle for any particularly violent projects.
Ryuk - Kenpachi's roommate. He's not quite sure what to make of this weird shinigami, but he doesn't dislike him, at least.
Falis - Spoken with on the boards only. Doesn't know her name, only as "Hunter". Tried to encounter for a fight during Night 41, but was waylaid.
Mitochondria Eve - NS only monster Kenpachi encountered but was not able to defeat. Has an obsession with taking her down now.