So I just adopted Dismemberment and I'm super stoked about it. The name was cleared from an inactive account, and I think it will be a good fit for the character I have in mind; a cunning serial killer whose story will tie in with another pet. I'm so torn over what color and species to make him though! I've been leaning toward a Graveyard pet because of the name, perhaps a neela, jollin or torrey? But I also dig the Bloodred Torrey, and some other bloodred and nightmare pets. Any opinions? :)

For me the blood red darkonite, charlie, and kerubi all spring to mind as pets that really give off that murderer vibe. Though I agree that the graveyard torrey is also a good candidate.

I'd suggest BR Torrey or BR Kerubi because you said your character is supposed to be rather cunning.

I'd go for the Bloodred Antlephore or the Bloodred Torrey! Honestly any bloodred pet would be perfect for a serial killer character.

Some of the Graveyard pets have more of a victim vibe to me, rather than killers, but some of them would be perfect! The Ghostly and Montre are nice, but I really like the Graveyard Neela:

A sweetheart pet because it's always the ones you least expect :O

I think the BR kerubi or BR Pherret fits due to their expression ^^ the kerubi seems to be enjoying the taste of blood and the pherret looks like it plays with the blood ^^

i have a Bloodred Harvester, on the same theme - serial killer/ cannibal. i think it fits well. though, as someone pointed out, you could go for a less obvious one as well, like a sweetheart pet [it could kill you with its sweetness ;) ]

[maybe i should take this piece of advice, lol]