The Red Dragon Samurai is a crossover fanfic between High School D×D and Samurai Jack written by Cowboy Alchemist. It follows the story of Kenny Kurosawa, an 18-year-old half-American/half-Japanese student of Kouh Academy as he unlocks his destiny, getting a harem along the way.
Samurai Jack has finally returned to the past and defeated Aku. Thousands of years later, a high school student named Kenny Kurosawa dies one night. But on that night, a mysterious sword appears before him. Reborn as a Devil by Rias Gremory; Kenny will face the dangers and perils of his new life. Will he be able to protect his loved ones and stop the evils waiting for him?
This story contains examples of:
- Alternate Self: We see alternate timeline versions of several characters that Jack met in his journey, like the Scotsman, X-9, etc. The First Legion of Darkness is, as a group, implied to be the counterpart of the cult that Ashi's mother belonged to.
- Ancestral Weapon: Jack passed his sword down the generations until it reached Kenny.
- Cop Killer: When Raynare tries to kill Kenny after their date, some officers try to help him. She becomes offended by the humans and casually kills one with her spear. She is about to kill the others when Kenny attacks her and goads her into chasing him.
- Cult: The First Legion of Darkness, Aku's followers who wish to resurrect their deceased master.
- Harem Genre/Battle Harem: But of course! The author has at least 24 girls, with at least one more unconfirmed! The current list is as follows: Rias Gremory (Main Girl), Akeno Himejima, Asia Argento, Koneko Toujou, Xenovia Quarta, Irina Shidou, Sona Sitri, Tsubasa Yura, Kuroka Toujou, Rossweisse, Grayfia Lucifuge, Ravel Phenex, Yubelluna, Isabela, Karlamine, Xuelan, Serafall Leviathan, Gabriel, Yasaka, Tiamat, Le Fay Pendragon, Seekvaira Agares, Elmenhilde Karnstein, and Kiyome Abe.
- Hero of Another Story: Jack's adventures and battle against Aku aren't well known to the supernatural community, mostly due to the time travel shenanigans.
- I Surrender, Suckers: Kenny handily defeats Raynare with the sword and is about to finish her off when she falls to her knees and begs for mercy. He tells her to leave and never return, but then she stabs him in the gut and calls him a fool for falling for her ploy. Fortunately, Rias shows up and revives him as a Devil.
- Mythology Gag: In his fight against Raynare, Kenny gives her the option to leave and live or stay and face her destiny. Her response goes like this:Raynare/Yuuma: MY DESTINY IS YOUR DEATH!
Kenny: Very well!
- Official Couple:
- Rias and Kenny get together much earlier than Rias and Issei did in canon. They also had sex, which hasn't happened in DxD canon yet either.
- The author has also confirmed that Gasper and Karen (Kenny's little sister) will be the Beta Couple.