An Unlikely Angel
All things considered, Jack Harkness was an unlikely angel.
Not the kind that had wings and a halo, thought Tosh; but an angel nonetheless. Her own personal guardian angel who'd saved her from the horror of prison, who'd given her a chance, a job, a sense of security, his trust, friendship, and respect. Yes, he was unlikely angel with his flirting (though not with her; never with her!), and his tall stories, and his occasional lack of mercy that darkened his face like the wrath of God, but to her, he was still an angel.
And that was what mattered.