For purposes of this list, "one-time" means they were central to an episode one time.
Some of the characters listed here have appeared in later episodes, but only briefly.
Dacosta eventually went to star in TV series including ABC daytime drama All My Children (2008), Ugly Betty (2009), and since 2015 stars in the NBC medical drama Chicago Med.
Also in 2015, Da Costa starred in the Lifetime television film Whitney as singer Whitney Houston which she received high praise for her performance.
She was murdered in a botched attempt on the life of Anna Devane in 2001 (resulting in the donation of her heart to Laura Kirk-English). Openly hostile to Angie's relationship with Jesse Hubbard, since he thought Jesse was not good enough for his daughter.
Appeared as a ghost to Ryan in 2011 to assure him that she was not David's last Project Orpheus patient. Formerly married to Pat Baxter, he died after being shot by Jesse.
Some of the characters have returned to the show, sometimes in brief speaking appearances, or just 'in the crowd' scenes.
She appeared in the ABC soap opera All My Children in 2008 as Cassandra Foster, the daughter of Angie Hubbard (Debbi Morgan).
During the same year, she appeared in the magazines Vogue, L'Officiel and on the cover of W.
In 2013, she also appeared as Carol in the historical drama The Butler, starring Forest Whitaker and Oprah Winfrey.
Former prostitute and adoptive mother of Emily Ann Sago Martin.
Her relationship with Chuck Tyler antagonizes Chuck's grandmother, Phoebe Tyler.
In 2010, Da Costa had supporting roles in the comedy-drama film The Kids Are All Right and the science fiction action-adventure film Tron: Legacy.