morpheus tells neo in M1 that when the matrix was first created there was ' a man born inside who had the power to change the matrix as he saw fit'.
i think sati fits this description. she was 'born' inside the matrix, from two programmes. She can change the matrix (sunrise). also, she is there at the beginning of this new matrix cycle. she is the last exile... a programme without a purpose, but made from human emotion (love). for this reason, she can control the matrix, because she is not part of the matrix code...she has different code in her...LOVE, which the matrix does not understand.
the reason she survives in the matrix is because the merovingian lets her... because he gained the codes to the oracle's shell from her parents, who are then sent back to the source.
another point....
seraph is a 'fallen angel'... and merovingian's doormen recognise him as such, outside club hel. this makes me think that he originally either worked for the merovingian, or tried to fight him at some point, but 'fell'. in either case, he then became a programme without a purpose, but chose to hide in the matrix, and serve the oracle. remember that neo sees him in a golden code in reloaded way before he ever goes blind... my thinking is that golden code represents code that is somehow different from the green code of the matrix... hence seraph, bane/smith/neo are all seen in golden code.