Art the Frog    Despite Art's generally passive outlook on life, he frequently finds himself a reluctant participant in adventures. Art is a 'Cover Critter', a job which requires him to 'sit on a pad in the sun' ten hours a day, five days a week. "It's a tough job, but I make it look easy." Art has a sarcastic streak; a creative bent; an I.Q. of 100; and large, floating eyebrows. Art once said it wasn't easy to be him, but had to admit he'd never tried being anyone else...
Bump the Bullfrog    Bump, a.k.a. the self-professed "Great Bump on the Log", is your everyday eccentric, amoral backwater guru. The bullfrog has an insatiable appetite for knowledge. His experiments have ranged in subject matter from hypnosis to perpetual motion to teleportation to the refutation of the Fourth Law of Aerodynamics. Asked once what his I.Q. was, Bump replied it was incalculable... which is possible considering Bump composed many of the available I.Q. tests in use today. 
Chub the Toad    Chub is emotional, inconsistent, short-sighted, and temperamental. His dedicated life's philosophy is "Ignorance is...", and he doesn't want to know the rest. The toad's two talents include the culinary arts, and annoying Bump. While often falling prey to Art's whit, Chub has the uncanny ability to hold his own in frequent debates with Bump. In fact, Chub usually comes out the victor, that is, the one without a migraine. "Any day I don't learn something is another day someone else has to worry about it." ...That someone else is usually Bump.
Dart the Frog    Art's younger brother, Dart is a despairing bachelor. He is melodramatic and addicted to romance novels and playing cat's-cradle. Dart spends most of his time in the park sitting on a stone and wishing he had the courage to talk to the she-frogs that pass by. Strangely, Dart has discovered he's actually pretty comfortable with this lifestyle... but that doesn't mean he no longer pities himself.
Milton    Milton is a butterfly and Dart's best bud and just as single. While Dart tends to be optimistic, Milton is unapologetically a pessimist. Or, as he would have it, a realist. Milton looks down on Dart's romance novels, but he himself is hooked on the lottery. This is the one area where his pessimism takes a backseat. He tells Dart he keeps playing because the lotto people "owe me!"
Rosco the Robin    Rosco is a flighty poet with 365 phobias (actually, it's 366 if you count his fear of Leap Year). Rosco has two missions in life: to motivate Art towards living a productive and useful life, and to catch Edgar Woim. To date, he has failed on both fronts...
Edgar Woim    Edgar is a fowl-mouthed member of the 'pink-color' working class. According to Edgar, the reason for his fowl mouth is his general lack of other body parts to hold the distinction. Edgar's job title is Senior Soil Digestion Engineer. During his lunch breaks he spends his time hurling abuse at Art, who Edgar sees as a distasteful member of the oppressive ruling classes maintaining the 'Soil Ceiling' above his head.
Art's Conscience    Everyone has one, and Art is no exception... except that his conscience is external: a fly. The fly just showed up one day. The conscience is a member of the WWCCMC (World Wide Committee of Consciences and Moral Control), and has risen to a level of some notoriety because of his lengthy reports on his client Art. These reports have become legendary within the WWCCMC, replacing much of the Committee's teaching curriculum in later years.