West Covina looks similar to Glendale, except she primarily speaks Spanish with some English, and has a thick, dark mustache and wears black, thick-framed glasses with a dark brown top hat. However, it is very likely that these accessories are part of a disguise to avoid being incriminated against, and that she in fact looks exactly like Glendale.
Like Glendale, West Covina is named after a community in Los Angeles County, California. Series creator Megan Nicole Dong noted in a tweet[1] that the name was also a nod to the musical comedy series Crazy Ex-Girlfriend. Notably, Zulius' voice actor Parvesh Cheena was a member of its cast.
In The Hootenanny, Glendale briefly wears a fake mustache as a sight gag and nod to this character.
West Covina speaks Spanish in every dub of the show, albeit with less Spanish being spoken in dubs for countries where Spanish is a rarer language.
She speaks Spanish in the two Spanish dubs as well, however, in these versions her Spanish becomes a less natural, more tourist-y variant, such as gringo Spanish being used in the Latin American dub, to help differentiate her from the other characters.