The character is played by Chloe Sevigny. Hit and Miss has gotten some buzz based on the premise of the show and I even heard about the show during my double secret weekend trip.
Cristan Williams had this to say on her Ehipassiko blog about it.
I decided to see for myself what all the fuss was about and watched the 6 available episodes. If you like assassin shows, it’s your standard fare. Now, about Sevigny’s portrayal of a pre-op transwoman… It’s good. At times my reaction to her portrayal of gender dysphoria is visceral and may be a trigger for some. At other times, I rolled my eyes at some aspects of the scripted portrayal. Having said that, the good outweighs the bad.
Here's the rest of Cristan's thoughts about the show .