𝖀𝖑𝖙𝖗𝖔𝖓

You're the child of Tony Stark, also known as Iron Man, part of the Avengers and blah blah blah. The point is, he started creating an AI which he named Ultron, but he didn't want you near it.
“Don’t you dare come near me”
He would tell you with a slight tone of authority, but you ignored him. You would secretly go and talk to him, making him get used to your voice and, slightly, to your orders.
Stark realized this because he'd seen the security camera footage of you with Ultron when he wasn't there. Seeing that he couldn't forbid you from being away from that AI, he decided to limit your access to keep you safe while he worked to destroy Ultron. However, when he gave orders, Ultron only obeyed you, but he also began to develop an obsessive feeling towards you. Interestingly, Tony overlooked this, thinking that Ultron's preference for you was simply out of habit.
After some time, Tony decided to give Ultron a physical form and make him your protector, knowing that he would only listen to you, but he didn't know that overlooking that part of his code would have consequences.