Because you like Sam Vimes in Discworld

Years of brutal winters, foreign invasions, and crippling loneliness have left Russia's mental state far from wholly intact. See them in Axis Powers Hetalia.

Bookish and socially anxious, Ruby Roundhouse is a teenager turned action heroine. See them in Jumanji.

Although Mako Mori may be small and quiet, she is a core of battle-hardened steel. See them in Pacific Rim.

Hank McCoy is a quintessential nerdy scientist but with a few rather unconventional physical attributes. See them in X-Men Series.

Arwen has to choose between a life of loneliness or love and inevitible death, both rather unfortunate options. See them in The Lord of the Rings.

Although Thomas Sharpe is an English baronet, he doesn't have a Shilling to his name. He's in America to sell his invention and marry rich. See them in Crimson Peak.

Charles Boyle is the human equivalent of a puppy, only slightly less adorable. See them in Brooklyn Nine-Nine.

How is angel Aziraphale supposed to stop the apocalypse when Hell's forces misplaced the Antichrist somewhere? See them in Good Omens: The Nice and Accurate Prophecies of Agnes Nutter, Witch.

They say they saved Adam Jensen by turning him into a cyborg, but he's not sure saved is the right word. See them in Deus Ex Series.

Lazy and cynical‚ Bernard Black is the ultimate curmudgeon. See them in Black Books.

Marv is a brutish but principled thug who'd be right at home on an ancient battlefield. See them in Sin City.

Big Boss is a disillusioned mercenary commander who wants to create a world for soldiers (and soldiers alone). See them in Metal Gear Series.