Dark Legends of Pretty Cure

Dark Legends of Pretty Cure is a fanfic by Ryanasaurus 0077 which is even darker than Dark Age of Pretty Cure and is inspired in part by Madoka Magica, Star Wars, and The Dark Knight Trilogy.

This fanfic contains examples of:
"Kana: You either die a hero, or you live long enough to see yourself become the villain. I'm not a hero, girls. Only someone who isn't a hero can protect Hikari's image now. So I know what I must become, so Hikari's image as a White Knight is preserved for all eternity."
 * Actor Allusion: To Yoko Hikasa, courtesy of Kana: "I'm not about to accept that I've become a zombie, you piece of shit!"
 * Anti-Hero: For much of the series, Kana is either Type V or an outright Villain Protagonist.
 * Author Avatar: Hikari Ippahara, who starts out as an idealist and gradually grows jaded. The author has confirmed that he's not the only influence on Hikari; Harvey Two-Face (who fights crime as Gotham's White Knight and pays dearly for it with his sanity), Jacen Solo (whose idealism leads him to become a Sith Lord), and Sayaka Miki (who fights crime as a magical girl but grows jaded courtesy of a broken heart and becomes one of the very monsters she was supposed to be fighting) also contribute largely to the influence.
 * Badass Longcoat: Kana combines this with Tights Under Shorts with her Cure costume. The longcoat is largely based on Bane's longcoat from The Dark Knight Rises.
 * Bittersweet Ending: Word of God says this will be the outcome; all he can say for now is that it'll involve a sudden transition from the Crapsack World portrayed herein to the canon world where many of the Curefics coexist.
 * Celebrity Voice Actor: Emma Watson as the voice of Kana Kitsune.
 * Darker and Edgier: Taken to Serial Escalation levels... and then comes the Bittersweet Ending.
 * Evil Counterpart: Kana to Hikari. The polarity is reversed when Hikari starts killing criminals and Kana has a Heel Realization, but Kana knows that she's capable of killing and doesn't wish for Hikari to be known as a murderess, so she instructs the other Cures to pin the blame on her for Hikari's vigilante killing spree, becoming the Dark Knight to Hikari's White Knight.
 * Heel Face Turn: Kana suddenly realizes that killing is wrong after learning that Hikari has started murdering criminals. The realization of what she had almost become is enough for her to seek reconciliation and even go so far as to declare that she would gladly perish against the monsters and take the full blame for Hikari's vigilante killing spree if that's what it takes to seal her redemption.
 * He Who Fights Monsters: A major theme of the series.
 * Holy Shit Quotient
 * Ironic Echo: Kana echoes Hikari's words back to Nagi, Ami, and Toshimi after obtaining the sacrament of reconciliation for the first time since losing her family, only this time, she knows what she must become, not what she has a chance of becoming.

"Toshimi: If I go out, I prefer to go out against one of those monsters, with all I've got, and I want to make it count."
 * Killed Off for Real: The author has noted that at least one Cure will be offed in the course of the series.
 * Light Feminine and Dark Feminine: Nagi and Hikari.
 * Nineties Anti-Hero: Kana developed this personality after her family was killed and she was left for dead. What did she do after that? She was criticized for not attending the funeral, she was turned out on the streets, she became very penniless, she lost her best friend--she even went to jail, Goddammit! That's what she did!
 * Obi-Wan Moment: How Toshimi wishes to die should she become a casualty after one of her friends gets offed in episode 3:

"Kana: Fucking hell... son of a bitch! So now we're walking corpses!?"
 * Obligatory Swearing: More than some of the author's other Curefics, even!
 * The One Guy: Mamoru Kinoshita.
 * Precision F-Strike: While Kana swears the most out of any character in the series, even she manages to make a profanity profound upon The Reveal (which hints at a possible Zombie Apocalypse):

"Hikari: You either die a hero, or you live long enough to see yourself become the villain. I fear I may live to see that day myself, like you have.
 * Redemption Equals Death: Following her Heel Face Turn, Kana states that she's willing to go this far to fully atone for her sins.
 * Shell-Shocked Veteran: Toshimi Torigoe, who is stated to be the Cure that has survived her job the longest out of any other Cure. She's also the oldest, at 24.
 * Start of Darkness: Kana lost all sense of hope after losing her family. Hikari tells her this during her own start down the path of darkness:

Kana: What the fuck do you know about seeing yourself become the villain? You're the White Knight here; I couldn't give more or less a flying fuck about myself. So die a hero, bitch! That's how you'll likely die anyway."

"Kana: I made a promise to the Lord to protect Hikari's image at any cost. I killed those criminals.
 * Take That Me
 * Tights With a Skirt: Worn by Ami and Mamoru with their Cure costumes; the latter is a notable male example.
 * Tights Under Shorts: On the other hand, Kana wears this with her Cure costume.
 * Tomboy and Girly Girl: Kana and Hikari.
 * Tonight Someone Dies: At least one Cure is going to bite it in the series.
 * Training From Hell: Kana trained with assassins after losing her family.
 * Villain Protagonist: Kana is either this or a Type V Anti-Hero for a good portion of her time in the series.
 * Well-Intentioned Extremist: Hikari is willing to kill criminals after she becomes depressed; Kana is willing to kill criminals from the start, but at least she has a Heel Realization upon finding out about Hikari and tries to make amends for her bloodshed.
 * What Could Have Been: Originally, Nagi's Cure name was going to be Cure Rosa, there was going to be a cameo by the Cures from Pretty Cure Perfume Preppy at the end as the key part of an explanation as to why there were two Cure Rosas, and Toshimi was to share her surname with Ikuko. The author still intends this series to be a prequel to the entire Pretty Cure universe, though.
 * What Do You Mean It's Not for Little Girls?
 * Wholesome Crossdresser: Mamoru is this in Cure form, wearing a Palette Swap of Ami's Cure costume.
 * Who Wears Short Shorts?: Kana.
 * Zero-Approval Gambit: Knowing she has stained her own hands with the blood of many criminals in the past, Kana instructs Nagi, Ami, and Toshimi to report her as the perpetrator of Hikari's vigilante killing spree before setting off to try to reach out to Hikari before it's too late.

Toshimi: No... you can't... you're not that kind of person.

Kana: But I can be that kind of person, because I'm capable of being a murderess. I'm whatever the city needs me to be. And if the city and Hikari's family and friends need me to play the villain so they can remember Hikari as a White Knight, so be it."