The default outfit of Eileen gives you the oportunity for making up to three versions of the same costume: uninjured, injured and possessed.

Either way, Eileen has about chin-length medium ash brown hair with just a few bangs on her right side. She wears gray-purple eye shadow and lipstick in light plum.
Instead of a necklace she uses a black lacy collar.

She wears a short, plum colored neckholder dress made of a smooth, slightly shiny fabric. The cleavage is low, as is the back of the dress. Around the waist it has vertical strips of black lace, and around the hips she has a silver chain.

Matching her dress and make-up, Eileen wears purple high heels with shoe straps and wide silver bracelets with a white-ish pattern on both her wrists. Her fingernails are painted in a pale, pink-ish lilac.

However, if you decide to do the injured version, you will need to use a lot of make up to cover yourself in fake bruises, abrasions and to make the numbers 20121 carved into the skin of your back. Faked, of course.
Additionally a large patch over your right eye, a cast on your entire left arm and bandages around your right forearm and your left lower calf.