The Cowboys

Ongoing Serial: a series of episodes, published over a span of weeks/months/years where the story plot is connected from chapter to chapter and must be read in chronological order for it to be understood properly.
Chapter Serial: a series of episodes, published over a span of weeks/months/years where the story plot is self-contained to a single chapter. There may be an overarching plot, but the stories can generally be read in any order and be understood
Book: an all-in-one self contained story published as a one-off.
Supplement: an an all-in-one self contained story published as a stand-alone supplement to a regular weekly/monthly periodical.
Short Story: an all-in-one, self contained story that was published in a regular weekly/monthly periodical
Anthology: a collection of all-in-one, self contained stories that were published in a regular weekly/monthly periodical but are generally grouped together.

As a lightning fast gunslingers, Lemon Kid is a specialist in playing the (cow)boy hero role. Although he grew up idolizing Melon Kid, one of the toughest outlaw bandits on the American frontier, Lemon's innate sense of justice eventually wins out over his boyhood desire to emulate his antihero and leads him away from a life of crime.

Aggo

The consummate lawman, Aggo is upstanding and righteous, but he is also hot tempered and quick to anger. Despite a slight weakness for alcohol, the merest drop of which will put him to sleep, Aggo is almost always cast as an authority figure. He is most often seen as a Sherrif in the Old West, but on occasion he will take on roles such as a school principle or a doctor.

Cactus Sam

Modelled after L'il Abner, with his goofy swagger and clean-cut good looks, "Cactus" Sam claims the middle ground Tezuka's "boy hero" protagonist roles.

Ken

A stalwart space cowboy-hero, Ken is a boy with a mysterious past. Captain Ken, also known as the “Savior of the Martians”, is a mysterious human hero boy who, along with his powerful robot horse, Arrow, intervenes to help combat the growing violence between human settlers and the indigenous martian population.

Heck Ben

Heck Ben is a recurring minor villain, with a vaguely cowboy-ish style. Although he is usually a man of few words, he is a master at delivering a sinister silence that can ramp the tension up in any scene he's in.