Oliver Want to Protect His Kids
Oliver: I'm your father, alright? It is my primary job in the world to protect you.
Mia: We don't need that. In the future, we're the ones that are saving the city.
Oliver: Well this isn't the future! This is months after I was heartbroken right before I left that I couldn't get you on the phone at your grandparents. So, I walked into your room to look at you one last time and you looked back at me from your crib.
Mia: And because you made the choice to protect us I had to spend my whole life alone. I didn't have a chance to know my brother to get to know you.
Oliver: I'm sorry that it worked out that way, and both of you can decide on your own how much you want to hate me and how much blame you want to assign. But, I made a promise to your mother to keep you safe and there is no world, there is no universe, there is no past, present, or future where I break it.