Simon Milligan is a producer of a TV show called Haunted L.A.
Milligan lives in Los Angeles, on the first floor of the Skyeline Apartments. He also is a client of Hannah Glazer, a prostitute. At some point, he decided to film an episode of his show in the Abandoned Hospital in Downtown, only for his crew to be killed one by one by Pisha, a Nagaraja Kindred. Milligan's fate is in the hands of The Protagonist, as (s)he can choose to either spare him or give him to Pisha.
Milligan is focused only on money and ratings, as he admitted that his show is scripted, with no real ghosts shown there. He is also cowardly, as he was deeply disturbed about what happened in the hospital but he did not choose to help his coworkers.
Milligan likely takes his name from Sir Simon Milligan, a character portrayed by comedian Kevin McDonald of the Kids in the Hall. McDonald's character is the host of a television show called The Pit of Ultimate Darkness that is devoted to evil, black magic, and similar topics.