Originally, Linus was going to be 16 years old, but when I started actually writing The Experiment, I decided he would be 20. I don't believe he was originally Georgie's brother either. He has been involved in trying to stop The Experiment for years, and his name is one Anne recognized from snooping in her brother's files. He is very smart, but is, by his own admission, no scientist. He can't do anything with chemistry or biology, but when it comes to technology, he can do just about anything. Don't ask me how, because I have no idea. He basically fulfills the role of a double agent, situated as he is within Miss Reginald's scientific research facility. He has been able to disable security devices while making it appear as if it accidentally broke, and he can get out of whatever Miss Reginald may confine him in.
On personality . . . he has a temper. He and Anne have some heated exchanges. He cares about his sister, and is anxious to reverse the experiments performed on her. He's great at spying, but he won't take the initiative to fight back. This frustrates Anne to no end, but he is insistent that the time is not right. He does insist that Anne obey him, and when she doesn't, it causes conflict. I suppose he's in the right, but still, I tend to be more on Anne's side. He is good friends with Brian and Henry Rubin. Linus is an interesting character, and I enjoyed writing about him.