I really love this trope, so I'm looking for stories which the siscon is at least one of the main characters that appear a lot throughout the story, not just some background supporting role. The character doesn't have to be blood-related/yuri/yandere towards her beloved sister, but the addition of any of those will make me notably happier, indeed. Examples on top of my head: - My Sister the Heroine, and I the Villainess - Saiai no Onee-sama ga Akuyaku Reijou datta no de, Kami ga Sadameta Unmei (Scenario) ni Aragaimasu (manga)
I, the useless sister, love my sister the creator god was enslaved by her yandere sister tilea's worries (Maybe) my sisters are strange when I became a girl, an unexpected love quarrel occured Moonlight Princess in Country of the Night (I think?) A lesbian elf and a cursed princess If you can read raws, then I can add more
https://ncode.syosetu.com/n6227ht/ I will later search for more. I have read a few. I know for sure one more such story but it was yuribait so I will not touch it with a 10 foot pole