"Feel it, it's muscle."
Reggie is  Soos Ramirez's cousin and grandson of Abuelita.
On July 13, 2002, a teenage Reggie attended Soos' twelfth birthday party.
At an unknown point, he got in a fight with a teenager and apparently sustained major injuries. 
Soos and the Real Girl," it is revealed that he is engaged, and he makes a physical appearance at the Gravity Falls Mall with his fiancée.
Reggie has a build similar to Soos, but with darker, longer hair and more facial hair. He wears a black t-shirt with an image of a winged skull under a sash that reads "Love", an earring, and a blue jacket with cutoff sleeves, and an upturned collar. The tattoo on his left arm reads ラギ (literally
"ragi"), which is a mistranslation of his name.
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1.0 1.1 "
Soos and the Real Girl." Mark Rizzo, Alex Hirsch (writers) & Matt Braly (director). Disney XD. September 22, 2014. No. 5, season 2. ↑
2.0 2.1 2.2 "
Blendin's Game." Jeff Rowe, Alex Hirsch (writers) & Matt Braly (director). Disney XD. November 10, 2014. No. 8, season 2. ↑
GRAVITY FALLS 2014 Comic Con [Complete Version] (July 31, 2014). Retrieved on January 15, 2015. ↑ "
Fight Fighters." Zach Paez, Alex Hirsch (writers) & John Aoshima (director). . Disney Channel. September 14, 2012. No. 10, Gravity Falls season 1