I'm a Trailblazer, Wearing a Secret Identity in a Crossover World

"Author, author, your Trailblazer is really strong, but playing them takes too much skill. Is there an easier, powerful character you can recommend?" "Sure thing, brother. There isn't just one character this strong. There are nine in total, all top-tier must-pulls in the current version!" The extradimensional beings known as "readers" ask the Trailblazer to fulfill their wishes, resolving the regrets and sorrows found in various worlds. Thus, the singer known as "Robin" captivates everyone in the world of girls' bands. Above the ruins of Shibuya, a purple-haired wanderer who calls herself a "Galaxy Ranger" cuts down Sukuna with one slash and defeats the Six Eyes with a second. The man called "Aventurine" turns Ai Hoshino, an idol who doesn't understand love, into the most dazzling superstar. In a world where chainsaws roar and demons roam, Makima meets Kafka. Terra, shrouded in the shadow of Originium, welcomes the peerless genius known as "Herta." ... (Quick transmigration. Leave a comment saying which world and character you'd like to see.)