Buttercup

thumb|Bubbles in the original series

Buttercup Utonium is one of the main protagonists of The Powerpuff Girls. She is known for being the most tomboyish and aggressive of the team and she are also known as "The Toughest Fighter."

Her personality is "spice", she frowned and pouted when the Professor named her simply because, like her previously-named sisters, her name "also starts with B". She can be hard to agree with to Bubbles and Blossom at times, but is the toughest fighter of the Powerpuff Girls, not only because of her "spice" side but because, as revealed in one episode, the reason why Buttercup tries her hardest to defeat whichever antagonists she must is because of her green blanket. Buttercup can be the surliest Powerpuff Girl at times but is practically fearless, loyal, quick-witted and willing to fight. Buttercup can be selfish at times, as revealed in one episode when the Powerpuff Girls started working for silver dollar allowances and Buttercup became fascinated by silver dollars, but soon discovered that she could obtain more by knocking out criminals' teeth and leaving the teeth for the Tooth Fairy. She is shown to be fairly protective of her sisters, though, and will not hesitate to confront anybody who speaks badly of them, such as in the episode "The Boys Are Back in Town" when she unwittingly discovers the Rowdyruff Boys' weakness after hitting Butch's tongue, who was laughing at Bubbles after putting a slug down the back of her dress while in sort of an unconscious state. She is often reckless but can be fairly witty at times, and she is frequently sarcastic. Also, she may be stronger than her other sisters, as revealed in the episode "Octi Evil" when she throws a monster rolled up in a ball to Blossom, which goes through various buildings. In one episode, she fights a monster all by herself without her sisters' help. She also has desires to be the leader instead of Blossom (revealed in "Octi Evil"). Craig McCracken stated in a World Premiere Toons interview that she is "the real quiet but real tough one". When flying she leaves a straight, sharp, jagged light green trail.

Splitsville
''Season 2, Episode 4 Air date: March 24, 2017 ''

When Buttercup leaves her sisters she shows off her huge arms and what she named her biceps.

Clawdad
''Season 2, Episode 5 Air date: March 31, 2017 ''

Buttercup has big arms when she imagines herself defeating One Claw McCraw

Musclecup
''Season 2, Episode 11 Air date: June 11, 2017 '' Feeling inadequate as a superhero, Buttercup bulks up. She gets big and sprays tanned in a week but it makes her too heavy to move so she has to lose it all to save her sisters.

Blossom3
''Season 3, Episode 4 Air date: May 20, 2018 ''

Blundercup
''Season 3, Episode 9 Air date: June 16, 2018 ''

Ragnarock and Roll
''Season 3, Episode 10 Air date: June 16, 2018 ''

Behind the Scenes
[[File:12530860_540447142801596_1389360073_n.jpg|thumb|Drawing by 2016 reboot storyboard artist Kyle Neswald "#Buttercup better ease up on those reps. #ppg"
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