Katrina is a human girl.
The earnest and hard-working teenage girl Katrina helped her grandfather Gale run a fruit stall in Agrabah's bazaar after Gale was injured fighting back against Jafar's usurpation of the throne during his brief reign of terror over the City. She and her grandfather were helped out by Princess Jasmine (thankful for Gale's sacrifice to her father) when they got in trouble with Iarr Ess, Agrabah's skinflint tax collector.
Behind the scenes
Katrina appears in the 1993 story More Arabian Nights.