Haystack is the personal fur of his/her player. The character's full name is Jake Ralph Caldoon (as male) or Jackie Rae Caldoon (as female). Currently located in Huntsville, Alabama, Haystack's player is a long-time resident of Alabama who was originally born in Maryland and has also lived in The Philippines; California; Mississippi; and New Orleans, Louisiana.
The character Haystack, an anthropomorphic tanuki, is located on FurryMUCK. Haystack entered FurryMUCK on 3 February, 1999, about two months after the player first came across mentions of the furry fandom.
In appearance, Haystack is about 6'2" (188 cm) tall, husky, and potbellied; s/he weighs around 270 pounds (109.1 kg). Bodyfur and headfur have separate shifting patterns of random swirling colors, except for a black mask around blue eyes. Nose, claws, and lips are black.
Haystack has gone through some changes over the years:
- 02/1999: Mark I - Grey Raccoon - Art by Melissa A. Jewell
- 02/2003: Mark II - Rafox (Raccoon/Fox) - Art by Haystack
- 07/2004: Mark III - Female Laprafox (Rabbit/Raccoon/Fox) - LJ userpic art by Haystack
- 12/2004: Mark IV - Grey Tanuki - Art by Haystack
- 09/2005: Mark V - Technicolor Tanuki (male and female versions; mostly played in female aspect) - Art by Haystack
 Other characters
(listed in order of creation)
- Rusty Caldoon (aka Stormpaw) - male blue raccoon - Active in The Napping Cat's Dream from 2001-2003.
- Xenia Samos - female brown beaver - Rarely active on FurryMUCK and was in The Napping Cat's Dream around the same time Stormpaw was.
- Buzz Buzz Master Gnat - male black gnat - Created for The Napping Cat's Dream in response to powergamers.
- Tyndall Ingram - hermaphrodite Fraxidan (bioengineered feline anthropomorph) - Played on FurryMUCK occasionally.
- Licorice Reisz - female black mouse - Not played on MUCKs.
- Divinity Reisz - female white mouse