[Somewhere, you can hear the small sound of Junpei's tears that will never escape because he's fucking expired.]

A catfish is a person who pretends to be someone else. Usually it's online, like the internet which I'm not explaining right now but it's a digital space. They steal someone else's identity, basically, to trick people into giving them information or fall in love with them. Usually they're the complete opposite of who they pretend to be.