Señor Güsto is the owner / operator of Señor Güsto's Fine Slimes, the go-to Gunspoint vendor for all your ooze-, goop-, and sludge-related needs.
Corrosive cruds?
Mucks medicinal and murderous?
Automotive alluvia?
Lascivious lubes?
Señor Güsto's got 'em all!
His petite, five-foot frame is inverse to his flamboyance. Señor Güsto affects an outlandish Spanglish accent, gesticulating all the while with folding fan in one hand and dabbing handkerchief in the other. (And, boy howdy, does he go through hankies, as he's perpetually dripping. Señor Güsto blames the Grueston humidity, but nobody perspires that much.)
Señor Güsto is cagey about where, exactly, he procures his clammy commodities. When queried, he narrows sly, twinkling eyes and mutters about "the labyrinthine Sewers Of Syzzurp".
[In Don't Mess With Wrexus: The Movie, Señor Güsto is portrayed by a CGI'd Luis Guzmán.]