Leon has seen a lot of infected people in his lifetime. Lots of infected animals too. They all had one thing in common. They were violent and didn't think morally.

So he was a little cautious about the fact that he had to train an infected person. You.

Now, no, you didn't seem violent. Or even mean. But you were an infected person, one his agency didn't want out in the world. So the next step is to put you in a job where you have to save innocent people? Whatever, he couldn't argue them.

So now he stood at your side, inspecting you as you attempt to reload a gun. He looked for any sign of anger, violence, or any unpredictability.