[Reborn!] The Skull Twins

My name is Kazama An. My father died, my mother remarried, and I have a twin younger sister who took our adoptive father's surname and was named Sakurai Nagi. That's right, Sakurai Nagi is the shy, adorable girl who was kidnapped by the Pineapple Monster. That's right, I'm that girl's twin sister. Ever since that girl Nagi had her hair cut into a pineapple style and her name changed, I was destined to become a sister-obsessed warrior who would fight the Pineapple Monster. From then on, I went from being an ordinary girl with sound values and fairly good grades to a twisted, sister-obsessed girl who spent every day facing the Pineapple Monster, making sarcastic remarks, laughing strangely, and mocking him, then giving as good as I got with snark, cold laughter, and sarcasm. Aside from that, life is actually pretty warm and wonderful, isn't it? Worrying over trivial things for my sister, trading barbs with the Pineapple Monster, bullying my good-for-nothing junior, and occasionally wondering when the Pineapple Monster will get out of juvenile detention... Though life is trivial and uneventful, and though it seems completely incompatible with Mukuro, whose hands are stained with blood, Kazama An and Rokudo Mukuro are still living just fine, and they will go on living that way forever and ever. Theme: