Serina. Tony never knew he had a daughter. Serina Cassidy, known as Subject 19, ID# 3346795 in Faculty XY, The Bionic Army Faculty. She was a sperm donation kid, created in the genetics lab at the faculty, but ever since the 'incident', Tony had always wanted kids of his own, technically more kids, but he was afraid of things happening to them. Lab Rats/Iron Man Xover. OCs