The Odd One Out in a Total Annihilation Plot

The famous Cloud Cave Organization recently discovered in some newly restored records that it was originally supposed to be called Chaldea. After the apocalypse was reset, the Cloud Cave Organization, formerly known as Chaldea, tried to continue the Holy Grail War and save the worlds on the brink of collapse. But how, exactly? The newly appointed Master-in-training, Rihuan Yanhang, made a decision. How about starting with a murder mystery game? Unconventional group transmigration + atypical secret identities Scenario 1: "Whether You're a Literary Giant or Not, You're a Real Stray Dog" Scenario 2: "Whether You Know Jujutsu or Not, You've Sure Been in Plenty of Fights" Scenario 3: "Forget Demon Slaying, the Blades Are Already Done For" Scenario 4: "We Know You Have Swords, but Let's Not Get Carried Away with the Dancing" Scenario 5: To be continued... Theme: Saving the world with laughter and cheer