Tracer POV

I sit and eat lunch in the mess hall. It doesn't hold a candle to Emily's cooking. I miss her sometimes. I take a bite and look around. We use this facility to train new recruits. They're all talking and eating. Training's done for the day, so they're free to do whatever they want for the rest of the day. I start to take another bite when Hana sits by me.

D.va: Hey Lena.
Me: Hey, Hana. How've you been, love?
D.va: I've been fine. Yourself?
Me: Oh, yesterday was wicked!
D.va: I heard about that. There was someone who came through the portal unconscious?
Me: Yeah! And even more concerning is that when we ran a medical scan on him, he and everything on him was riddled with radiation.
D.va: Radiation?! From the portal?
Me: We don't know yet. He still hasn't woken up. We had to scrub his unconscious body. And his robot arm.
D.va: He has a prosthetic arm?
Me: Yeah. Although, "robot arm" may not be the best term for it. It looked like he used whatever scraps he could get his hand on.
D.va: That must have been a challenge for him. What about the dog that came through with him?
Me: We had to scrub her too. Afterwards, she found him and hasn't left his side.
D.va: That's a loyal dog.
Me: Yeah.

Suddenly, my phone starts to vibrate.

Me: One second, Hana.

I look at who's calling me. It's Dr. Ziegler. I pick up the phone.

Me: Yes, Doctor?
Mercy: Lena, you better get over to the medical wing.
Me: Why? What happened?
Mercy: You remember the boy who came through the portal?
Me: Yeah?
Mercy: He's awake.

Timeskip

Hana and I enter the medical wing. Dr. Ziegler and Winston are already in there. The boy that came through the portal slowly opens his eyes. Then he props himself up using his arm. He sits there for a moment, then looks at us. He stays silent for a few seconds, then he speaks.

???: Y'know that's a little creepy, right? Waking up to see you all stare at me.

He looks at Winston.

???: Especially you, monkey boy.

Winston mumbles something under his breath, but I don't hear it. Then Dr. Ziegler speaks to the boy.

Mercy: How... how are you feeling?
???: Well, I am feeling a little sore in side. I'm assuming that's a cracked rib?

He touches his side, then winces.

???: Yep.

He looks back at Dr. Ziegler.

???: Did I have small syringes on me?
Mercy: Uh... yes.
???: Could you please hand me one?

Dr. Ziegler reluctantly hands him one. Why is he so... calm? He just came through a portal. You'd think he'd be a little freaked out.

He takes the syringe, jabs it into his side, and pushes the plunger down. Then he breaths a sigh of relief. He touches the same place on his side, only this time he doesn't flinch.

Winston: Is it a narcotic?
???: Oh, even better. Check the X-ray again.

Dr. Ziegler scans the boy again. When the scan is complete, the injury on his rib is... gone?!

Mercy: W-what?

The boy holds up the empty syringe.

???: Miracle of medicinal science... you're going wanna put this in a lead lined disposal bin.
Mercy: Noted.

He puts the empty syringe on the nightstand next to him.

Winston: Wait, you know about the portal's radiation?
???: Oh... so the portal did work.
Me: How did you know we were building a portal?
???: Oh, not your portal. I'm talking about mine.

What does he mean "his portal"? How does anyone know how to build a portal like that without attracting attention?

D.va: What do you mean "your portal"?

The boy hesitates, then sighs.

???: Okay... how many of you here know the "Many Worlds" theory?