UBU BUBU ftw
Ubu Bubu is actually two characters. Ubu is an adorable crayon-eating kitty. Bubu is the demonic creature that uses Ubu as a host.
In the first issue (the cover of which I could find on comicvine) Bubu had killed and devoured the parents of the children who kept Ubu as a pet. Bubu turned the children into prisoners in their home, doing the bidding of the Doom List handled by Stig, "The Ringmaster of Chaos." There are other extremely bizarre secondary characters that I will not even innumerate here, since even the vaguest description would be a spoiler.
In the second issue, Henry, one of the children, has a birthday party that would make the party in the movie "Blue Velvet" look like something straight out of "Sesame Street." And the Sexy Nazi Pool Party Culminating in the group crucifixion of the party-goers is hilarious.
This comic is one of those gems that cannot be delved into in terms of plot or character development, because death and subsequent resurrection are a page to page occurrence. But every page takes one by surprise guided by Smart's incredibly crafted storytelling.