Peter Quill: He is gonna be so pissed when he realizes I switched out the Orb on him.
Gmora: He was gonna kill you, Peter.
Peter Quill: I know. But he was about the only family I had.
Gmora: No. He wasn't.
Although I fully understand what this dialogue is all about, I'm wondering what the usage of on is here.
I think on indicates who is the recipient of the action.
Can you please give me some more examples?