Just a pic of Keith in his human form.

Though he may be a devout christian, he's a bit of a badass. He fights crime batman style at night.
He uses only necessary force on humans, but he shows no mercy to Tanar'ri and Batzeau (Demons and Devils respectivley).

As a modern warrior, he originally began his life as a warrior in the 'blood war' (google it up if you must know). He came to Earth through a wild portal along with a few others from random realms.
Now, in the modern day, the portals are opening again and various creatures are coming through, intent on destroying the earth. Only Keith and his crew from 'Sanctuary' can save the day (corny line!)

Also, I should mention that Keith is 2005 years old ^^