Mateo (aka Emerald Prince) is the brother of Daniel from the infamous YouTuber, Dorito's Reaction.
He is known to be the "Rager of Everything", hence the description of him. He is a 8-11 year old boy and dislikes Roblox hackers, hence the video "GREATEST FREAKOUT EVER! KID RAGES OVER ROBLOX". The video shows Mateo crying and raging due to a Roblox hacker (unknown what hacker) killing him through a wall.
Also, he also rages over gingerbread songs and Christmas songs, as per "LITTLE BROTHER RAGES OVER CHRISTMAS! *HILARIOUS!*", and BTS (Back to school) 'sorry BTS' ads.
He also screams a LOT. "said by Doritos Reaction" and sometimes goes on full rage and destroys literally everything and in older videos Doritos or Daniel got blood on his hand in the video "LITTLE BROTHER RAGES OVER CHRISTMAS! *HILARIOUS!*.
Mateo is a freaking menace to society pls let doritos reaction see this lololololololololol
Relations:
Daniel (bad)
Roblox (good or bad)
Christmas (hence the video): very bad