The League of S.T.E.A.M.

Crackitus Potts

Lady Ameliorette Potts

Thaddeus

Jay Are (11 episodes, 2010-2012)

Jasper Mooney

Sir Conrad Wright III

Coyote

Katherine Blackmoore (Undead Pulverizer) Ms. Blackmoore is contracted by the League of S.T.E.A.M. on a regular basis to aid in their efforts to reduce the population of the living dead. An expert with blunt objects, she favors baseball and cricket bats as her primary skull-crushing weapons.

Crackitus Potts (Nicholas Baumann), Ghoul Containment Specialist - Co-founder of the group, Crackitus carries a backpack (the Phantom Eradication Apparatus) which can deliver bursts of "high pressure steam" to disperse ghostly apparitions. Crackitus has also invented a "hunting utility gun" (HUG) which can fire a detaining net. His stage name is a play on the main character from the movie, Chitty Chitty Bang Bang (which in itself was a play on "crackpot", a slang term for an eccentric inventor).

Jasper Mooney (Duane Matthews), Lycanthrope Disposal Specialist - The League's expert on were-creatures, Mooney also assists Wright in his vampire-hunting duties.