Individually, the Rikus who travel through various worlds are ordinary and weak, but sharing a common talent, they are geniuses. Riku the Jujutsu: Jujutsu works like this; jujutsu masters only care about making wishes, and "binding" is a big consideration. Riku the One-Man: The old Rikus are passionate, the young Rikus are cunning and treacherous. Riku from the World of Miko: I don't eat beef. The Jujutsu world, the visible Miko, Under One Person, Naruto, Bleach, One Piece, A Mortal's Journey to Immortality, Spider-Man Dungeon, DNF, Digimon, Pokémon, Hogwarts... When they stand atop the mountain: "I, Riku, owe my success entirely to myself. Rikus, give me a boost!" Keywords: Simultaneous travel, shared talent, crossover. Current progress: Jujutsu Kaisen—The Visible Miko—Under One Person—The Buried Frilian—Kengan Ashura and Hunter x Hunter.