Speedy

History

Mia was a derailed teenager, who was in the prostitution ring, and was saved by Green Arrow (Oliver Queen) from her client. After that, Mia then becomes Green Arrow's ward. One day, Mia comes across his longbow, and Green Arrow offers to train her in efficiently using the longbow. From there on, Mia officially became his sidekick, though she had not yet taken on the name of Speedy.

However in 2004, it was revealed that she had become HIV-positive in light of her prostitution.   Even so, Mia convinces Green Arrow to let her become Speedy. After a while, Green Arrow decides that she would do well in the Teen Titans. For Speedy to earn her spot, She is pitted against Robin. Even though Robin beats Speedy, she shows herself as a skilled fighter. After their first mission, she reveals that she is HIV-positive to the team, which they accept.

One Year Later

One year later after the events of Infinite crisis Mia is seen as one of the titans while Cyborg was shut down and was then revealed to have been training on an island with Green Arrow and Conner Hawke. During her stay at the island Green Arrow recruited the best teachers in everything from long distance jumping to cooking. There she trained in many skills such as cliff jumping and sword fighting. She was later seen helping Brick and Green Arrow.  She also instrumental in rescuing Green Arrow from Amazon capture after he is presumed dead.

Abilities and Limitations

Mia does not possess any superhuman abilities, though she is proficient archer and uses the longbow well. As Mia is HIV-positive, she must be careful when injured because of wound openings and must take large doses of anti-retroviral drugs, with all of their side-effects.
 

In other Media

Mia is a recurring character in season 9 of Smallville. She is a teen prostitute Oliver helps escape by first trying to buy her out with an expensive sports car and then when that doesn't work he defeats the pimp and drives by and picks Mia up. 

Mia in Smallville