The Bully: He loves throwing his weight around, quite literally at times.
The Brute: A hulking bullying cat who has no problem harassing the neighborhood cats.
Even Evil Has Loved Ones: Not really "evil", but comes pretty close. The murder of Solitaire, one of his girlfriends, made Kong want to find who was responsible and rip out his limbs.
Gonk: He's nominally a Himalayan, but such a hulking, fangy brute has more in common with a smilodon then a domestic cat.
Hidden Heart of Gold: Ultimately comes out with the horrifying death of Solitaire, his mate, causing him to do a HeelFace Turn, forget about menacing the protagonists and turn all his energy into finding the murderer.
Meaningful Name: He's the biggest cat and named after the biggest beast in fictional history.
Voiced by: Ulrich Wildgruber (German), William Roberts (English)
Death Seeker: He lets Claudandus kill him to prevent their secrets from getting out.
Pet the Dog: Yeah, he's a total crackpot, but he did take in and raise Isaiah.
Voiced by: Helge Schneider (German), Ian Tyler (English)
Sanity Slippage: A lifetime of guarding the dead has left him more than a bit unstable.
Affably Evil: Even after being exposed as the Big Bad, he still treats Francis like an equal and remains polite.
Fantastic Racism: His experiences have convinced him that all of humanity is irredeemably evil deep down.
From Nobody to Nightmare: He started out as an orphan cat who became Preterius' lab subject. After months of torture, he kills his master and sets out to remake the current cat population.
Handicapped Badass: Despite being an old cat dying of cancer, stated to be a few months ahead of the reaper, he does manage to ambush and seriously injure Bluebeard and fights like he's got nothing to lose against Francis.