|Champion||Background||Strategy||Skins & Trivia|
- Katarina was designed by Coronach.
- Katarina's bio has been revised by RiotRaven and Kitae in order to give her character more depth.
- Katarina is voiced by .
- Katarina's name may be a reference to Katherina from William Shakespeare's Taming of the Shrew.
- Katarina's family name, Du Couteau, is derived from French, which means "Of the Knife".
- When Katarina was first released, her default skin was the one that is now labeled as her Mercenary skin. This also applied to her imagery on skill icons, which can still be viewed in-game. She later had her skin, her voiceovers, and her backstory reworked.
- A framed portrait of Katarina can be seen in the preview video for the Mac Version Launch for League of Legends.
- Katarina is the sister of Cassiopeia, making them one of five pairs of sibling champions. The other siblings champions include Kayle and Morgana, Garen and Lux, Nasus and Renekton, and Darius and Draven.
- Katarina's Shunpo is possibly a reference to a fictional technique in the popular manga series . Its name is Japanese (written as 瞬步) and means "Blink Step" (localized as Flash Step), indicating that the person can move between two spots in the blink of an eye.
- Katarina was one of the champions chosen for the Noxian pool available during the Ionia vs. Noxus match. However, she was not one of the selected champions.
- Katarina's dance references from the last dance scene in the movie here.
. The scene can be seen
- It has since been changed; It still features the first part of the dance, but the later animation of the dance is now a punching motion with her knives that rapidly gains speed.
- Katarina is one of the few champions to feature two champion spotlights due to significant changes to her kit.
- Katarina's daggers were chosen by the community to be forged by Man at Arms.
- Katarina's old voiceovers were similar to the new ones but were angrier. Her old voiceovers can be heard here.
- Katarina's old taunt used to be, "Remember, evil spelled backwards is live. No coincidence."
- Katarina's old joke is a reference to her old voice actor, who mispronounced the term "Dance Macabre". The joke refers to the , or "The Dance of Death," a medieval allegory on the "Universality of Death."
- Katarina is one of the few champions that have had their voice actors changed; others include Anivia, Janna, Karthus, Cassiopeia, and Nasus.
- Katarina's quote "Why? Because I can." is a tribute to Shawn Michaels, famous WWE wrestler.
- In the "Abilities" tab of her champion overview, when Ctrl + 1 is pressed you can hear a different joke than her in-game joke: "Killing is my duty... fun is yelling 'surprise'!"
- During the Maokai Art Spotlight, a photoshop tab called :File:Katarina OriginalSkin.jpg|katarina-painting1.jpg was visible. The image on the tab turned out to be a new splash art for Katarina's Classic skin.
- Katarina's Chinese artwork shows her having a tattoo on her right hip. This tattoo is also visible in the Season One trailer, but not on the normal splash art.
- Katarina in-game model now has a tattoo on her left side after the rework.
- Katarina currently has an unreleased skin under the name "Crimson Elite Katarina".
- It is was inspired by ChiZ'sSwashbuckler Katarina skin.
- The animator also inspired Riot with his White Knight skin for Poppy.
- This skin along with the soccer skins for other champions, appeared just before the 2010 World Cup started, and were removed from the store on October 31, 2010.
- She shares this theme with Twisted Fate.
- This skin has a new taunt animation in which she does a backflip instead of the usual animation.
- Her previous Recall Animation had her pole dancing with a candy cane (can be seen here) and was later changed to her slicing a candy cane instead. Riot stated that the change was because the previous animation did not match with Katarina's theme.
- A man in Slay Belle Katarina's splash art is similar to Garen in clothing and hair. It might be done on purpose.
- It is a homage to Koei's design of  in , a game based on .
- She shares this theme with Jarvan IV, Nidalee, Tryndamere and Xin Zhao.
- Katarina and Cassiopeia are sisters.
- Katarina regards Talon as a colleague and, in some ways, a little brother. However, she also treats him like an emotional punching bag from time to time.
- Katarina and Garen first fought during a war between Demacia and Noxus.
- Katarina and Garen were the ones who stopped the inter-city brawl in Kalamanda.
- According to Blitzcrank's "Fleshling Compatibility Service," a dating service made by Blitzcrank, Katarina and Garen make a perfect couple, but are not officially together. Fans have since been joking about their relationship.
- Katarina once came to Demacia to protest about High Councilor Heywan Relivash's conspiracy in Kalamanda along with Jarvan IV. She was attacked but Garen defended her.
- With her unreleased skin, she is revealed to be part of the Crimson Elite, along with Riven and Talon.
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