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The PC emulator Ryujinx (recently discontinued) and Yuzu (also discontinued) were capable of running NSP files. Persona 5 Royal runs exceptionally well on PC via emulation, often achieving 60 FPS or 4K resolution—improvements over the Switch’s native 30 FPS/720p (handheld) presentation. The NSP is the required format for these emulators to read the game.
If you'd like to dive deeper into this story, I can help you: with specific Persona abilities.
Ren was a high school student in Tokyo who led a double life as the leader of the Phantom Thieves of Hearts. One night, while he was navigating the Metaverse, he stumbled upon a mysterious digital artifact known as the "Persona 5 Royal NSP."