"Who am I?" is a difficult question for any person to answer. Human identity is a complicated thing. It's next to impossible to figure out if you have an alien species sharing your brain. In The Host, both humans and aliens are having a bit of an identity crisis. Wanda realizes that it's impossible to separate the human feelings of Melanie's body from her own. Humans who are revived after being implanted by the aliens are stuck in a haze of confusion. If your body chops down a tree in the forest, but you weren't in control, was it really you?