Catch is a big word. Doof would meet Kira by accident while doing an evil scheme in Japan, but every time Kira tries to write his name into the book it doesn’t work for a different backstory-related reason. He’s legally an ocelot, his parents were too poor for vowels, so that’s technically not how his name is spelled, he’s technically not a doctor, etc.
Kira gets so irate he launches into a rant where Perry the Platypus can hear him. Doof walks into the room mid-fight, and while he never actually understands what Perry has against the kid, if a platypus tells you to square the fuck up, you square the fuck up. The lab blows up in a way that incriminates Light in a dozen Kira-unrelated crimes and he gets arrested.
On his way to getting deported Doof finds the death note. He reads the rules and never even turns around to see Ryuk before calling it idiotic and tasteless, and spends the entire plane ride home deriding the very concept.
