Leon

In the first murder case of Danganronpa 1, there's a clue where the victim wrote the number 11037 in their own blood on the wall behind them (the blood in Danganronpa is pink as a stylistic choice). Except the writing is clearly actually just the name "Leon" written upside-down, which is the name of a character in the game. When the protagonist sees this clue, they don't realist that it says Leon, and they think it's just the number 11037. Joe, however, noticed so quickly that he realized that it said Leon before he even realized that it was supposed to look like it said 11037. He didn't want to believe that this was the critical clue of the whole case and that Leon really was the murderer, but of course, he was.

From then on, Joe pretended that he couldn't figure out what the numbers meant and that he didn't know that Leon was the killer. A Twitch user called TimFoyle said that the numbers actually spelt out "Noel", and that he'd got it all wrong. Then even after the first case, and even after the first game, he would pretend that Leon was the culprit behind every murder even though he's dead, and he would keep on pretending to see 11037 everywhere, then saying "Wait… Leon!". This is what led to this meme in particular becoming so repetitive that people actually got annoyed by how long Joe kept it going for. Joe admitted that it was getting old but that he couldn't stop himself from referencing it constantly.

In Danganronpa 2, there's a building which can only be unlocked by typing in the correct 5-digit number into a keypad on the outside. When Joe inspected the keypad, he wanted to type 11037 into it, but the game doesn't let you type anything in until you find out what the actual code is. But it turned out that 11037 was the actual code.

This meme is represented by the emote jphLE.