Curio is Francisco's counterpart.
His entire family was killed by the Montagues, and he has sworn to have his revenge on them. Curio is almost always the one who bails The Red Whirlwind out of sticky situations. He is the one who shows her the world and opens her eyes to the true seriousness of their situations; if Juliet wants the winds of change to blow, she will have to be less reckless in her actions.
Curio is a down-to-earth and serious man. He is a man of few words and decisive actions. Curio is dedicated to protecting Juliet with his life. Curio is also in love with Juliet, which Francisco often teases him about, despite being in love with her himself. (As seen in the series.)