Beware The Nice Ones: Web Animation

  • Trisha Cappelletti from The Most Popular Girls in School, is normally sweet, but if you hurt her friends, prepare for shit to go down. Poor Ashley Katchadourian and Shay van Buren learned this the hard way.
  • Yumeria in Card Players. There's obviously a reason she carries a gun everywhere she goes.
  • Shandala in Broken Saints. Can you say terrifying, kiddies?
  • Flippy of Happy Tree Friends. Dear God.Background 
  • Steve the Pirhana Plant in The Movie of Bowser's Kingdom. Why 
  • In Red vs. Blue, 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 not be given further opportunity for betrayals.
    • Caboose is another example. He started out as an idiot and only got 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 Texbots all on his own.
    • Doc was also a case while he was stuck with O'Malley for a while.
    • The flashback subplot in Seasons 9 and 10 shows that Washington was pretty meek for a Freelancer, contrasting with his later personality and 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 Team Mom. 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 Morty Kombat is a rare, villainous example, with a very nice exterior, and a very mean, dark side.
  • Catbug is adorable, 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 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.)
  • RWBY takes place at a military school in a World of Badass, so any 'nice' character probably fits this trope. Special mention goes to Pyrrha, who introduces herself by saving a total stranger from plummeting to his death with her excellent spear-throwing skills and power over magnetism.
    • Jaune. In Volume 1, an Ursa attacked the Jerkass who was bullying him, so he ran at it and ended up decapitating it, and then topped it by turning around to the utterly gobsmacked bully and sternly telling him to leave his friends alone. In the season finale of Volume 2, an even bigger Ursa attacks him, and he slices it to ribbons.
  • In Death Battle, between two combatants, if one of them is nice and the other pretty much isn't, the nice one usually ends up winning.
    • Rainbow Dash only attacks Starscream when he threatens to kill her, then delivers a thorough beating. Then, she eats his Spark!
    • Yoshi is described in the intro as a "cute, happy dinosaur". His fight with Riptor ends with him throwing the ferocious fighter over a cliff, after drenching the latter's face in his own acid.
      • This one is particularly notable as for most of the fight, Yoshi just stands there getting beat up.
    • Princess Peach, the somewhat ditsy, happy-go-lucky girl who can't take ten steps without getting kidnapped, kicks Zelda's face so hard her head explodes.
    • And then there's the loud-mouthed, fun-loving Spider-Man slingshot-kicking Batman's torso off?
    • Goku vs. Superman is a battle between two incredibly friendly and kind, not to mention incredibly powerful beings. Goku is noted as being a family man outside his fights, and Superman is... well, Superman. Their clash results in the utter destruction of the Earth, and it's implied Superman was still holding back tremendously.
    • Yang Xiao Long is, Blood Knight tendencies aside, a laid-back teenage girl who's fond of puns and a joy to hang out with. She also brutally kills Tifa via Recoil Boosted Neck Snap after Tifa cut her head and worse rips a lock out of her prized blonde mane.