Matt Engarde (@nickelsamurai )

Matt Engarde, sometimes known as Matpat Engarde, is a character from Ace Attorney: Justice For All who is written by @rebootmon.

Engarde formally played the Nickel Samurai on the hit TV show The Nickel Samurai (as seen in his Twitter username) before he was arrested for his catboy crimes against humanity. He now tweets game theories from jail and gets bullied by domestic animals sometimes.

Lice Arc
Matt was initially blamed for the outbreak of deadly lice on Twitter by Shi-Long Lang, but it was eventually revealed that Sherlock Holmes was the one giving everyone both lice and fleas. Matt initially denied any claims to having lice, but eventually revealed that he hid all of his lice in his front bang.

He revealed that in his past relationship with Celeste Inpax, the two of them had a falling out over Matt's lice problem, but it appears their breakup was pretty mutual.

Missile (@missiledoge)
Missile often replies to Matt's tweets with the phrase "cry about it bitchboy" which originates from a tweet made by Twitter user @its_inkky. Matt has admitted that Missile has made him rather afraid to tweet at the risk of being called a bitchboy multiple times.

Shoe (@shoemeow)
Shoe is Matt's pet cat from before he was arrested. Since Matt is no longer around to take care of her, Shoe has taken control of their house and lives there with a roomba and a motorbike. Overall, Shoe is very mad at Matt for killing the star of her favorite show, The Jammin' Ninja.

Trivia

 * Matt's favorite anime genre is isekai, and his favorite anime character is Ferris from Re:Zero - Starting Life in Another World (note, @rebootmon hasn't seen this anime Ferris is just the only catboy they know). His favorite fictional character is Scourge from Warrior Cats.
 * Contrary to popular belief, Matt does not carry around a glass of alcohol; it's actually chocolate milk that he drinks with a silly straw.
 * In the past, @rebootmon used Matt's account as a joke twitter for Kaito Momota from Danganronpa, hence why the account dates back to September 2016. Unfortunately, even though they softblocked all the Danganronpa accounts, Twitter still believes Matt is following them and will often recommend 2016 Danganronpa RP Twitters to anyone who interacts with him. Missile is often annoyed by this and will swat them away with a broom angrily.
 * Matpat Engarde is a separate entity from Game Theory Matpat, but they share some similarities. They both believe Sans is Ness and both gave the Pope a copy of their favorite video game.