Well, they tell you she's an adult but she has the demeanor of a 16 year old. Nadia's youth was a running joke in my guild around launch.
"You know Nadia's like, 14 right?"
"What, really?"
"Nah, they tell you she's an adult but that's obviously just to keep the police off their backs. She's clearly a kid."
Please, tell me more about how the obvious exaggerations smiley faces in the OP were not part of a joke. Did you really think I felt nervous romancing the characters that all had codex entries professing their age and that I thought Bioware is filled with lecherous writers interested in underage girls whose lewd fantasies were bleeding into their work?