Leonard Hugo remains, thus far, a bit of a mystery. Apart from his questionable friendship with Sebastian Duran and their brief and catastrophic appearance in Burns, Colorado, little is known of his history. Less still is known of his character, his personality, or his interests. He has been known to use phrases in Russian, though it is not known whether he is fluent, and he sometimes claims to have been born in Bethlehem, Pennsylvania.
All that can be said for certain is that he enjoys coffee, cannot drive, and is a vampire.