Defiant Assassin
Harmony:
Genetically engineered to be the best of the best, but ended up flawed. This flaw caused her to be used in yet another experiment. This one led to her having no emotions or drive beyond completing the mission.
Thorne:
Rescued by a notorious mob boss at a young age and trained to be ruthless, but no amount of training could crush the compassionate soul. What will happen when these polar opposites are forced to work together? Will they fill in the missing parts of the other or will their differences be too much to overcome?