I was all alone when he found me. My Angel... Well I suppose I wasn't alone. My team was with me. But I was the only one truly alive. It was just supposed to be a simple grab and bag but something went wrong... Now they're all gone. Something got inside my head. I couldn't stop it... It made me kill them. Gwen, Owen, Ianto, all gone. But the thing left me and stole Jack. He was going to kill me I knew it. But that was going to my punishment. I killed my team now I would die at the hands of my teammate.
But that's when my angel came. Jack's eyes burned with light and he crumpled to the ground. I knew he was truly dead this time. Then my angel spoke.
"I'm Gabriel, and I'm here to deliver you, blah blah blah and all that jazz." He placed his hand on my forehead. "It's a downright shame. You're kinda pretty." His form shimmered with golden light and I screamed. My eyes burned and the golden angel faded away.
My name is Toshiko Sato. I stared into the face of an angel and died. But just before Death claimed my soul I saw my angel turn and leave. And that's where my body remained for ten more years. In the basement of an abandoned factory. Down amongst the dead men.