Marimonda, for sharing her voice with fellow Ensemble Dark HorseLord Dominator, whose show had ended right before Marimonda's debut episode and she gets to sing too.
Esteban seems to be one among older viewers, who enjoy the complexity of his character.
King Joaquin, Queen Teresa, and Princess Caterina for being Afro-Latino representation in Disney.
Carla's alternate persona Rita, whom many fans found more cute than Carla to the point that they wish she were a separate character. Although Carla herself also seems to be one for being cute and hilarious yet cunning and evil as well as having a compelling Freudian Excuse.
Princess Marisa, aka "Hispanic Ariel", was immediately popular after "Song of the Sirenas" aired.
Olivia for being Mateo's moe and nice girl apprentice.
Tomiko from the episode "Class Act" has also gotten popular due to her chemistry with Isabel and for being an extremelyAdorkableGenki Girl. Helps that she's voiced by Kimiko Glenn.
Rebecca for being Disney's first Jewish princess (and a Latino/Sephardic Jewish princess at that).
Bruce the Butterfrog for being so protective of his sunlight exposure that he's the villain in one episode.
The crayfish that also serves as the villain in "The Incredible Shrinking Royals".
