* Yumeria in ''Card Players''. There's obviously a reason [[spoiler: she carries a gun everywhere she goes.]]
* Shandala in ''BrokenSaints''. Can you say terrifying, kiddies?
* Flippy of ''HappyTreeFriends''.
* Steve the Pirhana Plant in TheMovie of BowsersKingdom. [[labelnote:Why]]After Hal insulted him one too many times, Steve told Bowser they had betrayed him, setting the events of the movie in action.[[/labelnote]]
* In ''RedVsBlue'', Sheila is pretty nice and even-tempered, especially in comparison to the rest of the cast. She's also the installed AI in a ''tank''.
** Another AI example is Delta. Mostly emotionless, he's nonetheless shown subtle and very touching dedication to his partner York, even insisting on staying beside him into death. He's later revived, and partnered with South Dakota, who proceeds to try using him as bait to let herself escape. When South is captured, it's Delta that recommends that she [[NoNonsenseNemesis not be given further opportunity for betrayals]].
** Caboose is another example. He started out as an idiot and only [[{{Flanderization}} got]] [[TheDitz dumber]]. However, he is by far the nicest member of the main cast; he cares more about making friends than fighting (unfortunately, when he does fight, generally he's a danger to his allies). However, when he worked himself up into a fury, aside from launching into a series of nonsensical one-liners ("Your toast has been burnt and no amount of scraping will remove the black parts!"), he defeated two armies of flag-obsessed zealots. And later quite a number of [[spoiler:Texbots]] all on his own.
*** [[FridgeLogic His nonsensical one-liners are actually helping him fight,]] because he's saying things that make him angry, prolonging his UnstoppableRage. YouFightLikeACow probably makes the slaughter easier for him.
**** Don't forget that his SuperPoweredEvilSide is caused by him imprinting an evil AI.
** Doc was also a case while he was stuck with O'Malley for a while.
** The [[OriginsEpisode flashback subplot]] in Seasons 9 and 10 shows that Washington was pretty meek for a Freelancer, contrasting with his later [[TheStoic personality]] and [[IDidWhatIHadToDo actions]].
** Add North Dakota to the list as well. He's easily the nicest and friendliest of the Freelancers, to the point where he got the AI he did specifically because he has a nurturing personality and is the TeamMom. But he's still one of the top Freelancers, capable of mowing down an army of Mooks and expertly dual-wielding ''sniper rifles''.
* Shao Kahn of {{WebAnimation/Morty Kombat}} is a rare, villainous example, with a [[AffablyEvil very nice exterior]], and a very mean, dark side.
* [[BravestWarriors Catbug]] is [[RidiculouslyCuteCritter adorable]], [[CheerfulChild innocent]] and loves to play with anyone and everyone. He also shaved Danny's eyebrows (and possibly Chris' hair, too) upon acquiring an electric razor in "Browser Fail", and was revealed to have [[spoiler:killed Jelly Kid]] upon their first meeting in "Jelly Kid Forever". (To be fair, he *is* part-cat, and happily justified his actions as being a present for Danny...like any cat would.)
** Oh, and he's also an EvilOverlord in more than one AlternateUniverse. Yet somehow still adorable.
* ''WebAnimation/{{RWBY}}'' takes place at a military school in a WorldOfBadass, so any 'nice' character probably fits this trope. Special mention goes to [[TheAce Pyrrha]], who [[EstablishingCharacterMoment introduces herself]] by saving a total stranger from plummeting to his death with her excellent spear-throwing skills and power over magnetism.