While I love IMDB for a quick reference, it is not always the best resource to see who is playing who in a movie, especially when the film is shrouded in secrecy. The people who are making The Host are not really forthcoming about a full cast list. While this is frustrating to someone like me who runs a site based on news, it is also cool as a fan of the book since not everything is getting spoiled for us all at once.
I will immediately update this post if any of this information is incorrect. This is all coming from IMDB. The descriptions of the characters are all from The Host Wiki. The character descriptions do contain spoilers if you have not read the book.
Fords Deep Water – Marcus Lyle Brown
“Fords Deep Waters is a soul and the Healer who inserts Wanderer into Melanie Stryder’s body. His assistant isDarren. Despite the natural good nature of souls, he has difficulty getting along with The Seeker due to her abrasive personality. ”
Brandt – Mustafa Harris
“Brandt is one of the humans who live in the caves found by Jeb. He is described as not being very big, but very solid (most likely meaning muscular).
He was shot by Wanderer’s Seeker, fortunately for him the bullet just missed his heart and lungs. Doc used Heal, a soul made medicine for human bodies, to heal the bullet wound in Brand’s shoulder. When the Seeker is brought back to the caves, Brandt is one of the men who gaurds her, along with Aaron.”
Wes – Shawn Carter Peterson
“Wes is one of the human rebels hidding in Jeb Stryder’s caves. He came from Eureka, Montana. When Wanda first came to the caves, he was not openly hostile to her, yet he wasn’t friendly either. However, over time, Wes became one of the first, along with Ian O’Shea, Lily, Walter and Jamie Stryder, to overcome his hatred of souls and slowly became Wanda’s friend.
While the humans were waiting for Jared and Jamie to return from a raid, Wes and Lily played a friendly football game against Wanda and Ian. Just after the game, Wes admitted that he was in love with Lily. Despite being older than him, Lily reciprocated his feelings. The two became the happy couple of the Caves. However, their happiness did not last long. A Seeker, who had been hunting the last remnants of human resistance, found the caves and killed Wes. Lily and Wanda were both destroyed by his death.
After burying him next to Walter’s tomb, Wanda revealed her greatest secret: how to remove a soul from its host’s body without killing either of them. When Wanda had Doc promise to remove her from Melanie’s body, she insisted to be buried next to Wes and Walter.”
Lily – Raeden Greer - I have seen Raeden and Frances Fisher tweet each other back and forth while they were filming so I am pretty confident that this is correct.
“Lily is a member of the group of humans living in the caves. She is tall, athletic, and has caramel colored skin. She is one of the first humans to show kindness and acceptance toWanderer. She has long been admired by Wes, who is younger than she is. Eventually they begin a relationship and are very happy together.
However, their happiness does not last long because The Seeker kills Wes by shooting him in the head. Due to this type of injury and instant death, Doc is unable to use ‘Heal’ on him (a medicine developed by souls to heal all ailments). Lily goes into a deep depression over the loss of her loved one.”