Castuera graduated from the
California College of the Arts, and it was at this university that she got involved with
Giant Robot, a bi-monthly magazine of
Asian and
Asian American popular culture. After graduating, she moved to Los Angeles and eventually landed a job as a character designer on the
Adult Swim series
Metalocalypse after she drew a card for the series' lead character designer,
Songgu Kwon. After an indie comic of hers was well received by
Pendleton Ward, she was hired as a storyboard revisionist on the
Cartoon Network series
Adventure Time. She was eventually promoted to storyboard artist, and served in that position until she left in 2013 to focus fully on her art career. In October 2014, however, she returned to the series to temporarily storyboard several episodes during the show's
seventh season, and during the show's
eighth season, worked as a storyboard revisionist. ==Accolades==