Migi will reunite with Shinichi in the end
- This is from episode 22 where Migi appears to have died. The parasite that calls using Shinichi's voice is separate from the one that attacked and failed to kill Gotou. It also had significantly more mass than the one that got killed by Gotou. Therefore, the remaining part of Migi will survive by latching onto Gotou's body and find Shinichi again by this method.
- this appears to be true by the next episode.
The parasytes actually have a full range of human emotions
- The parasytes have only appeared recently. Even the oldest ones are not much more than a month old. It is likely they only develop their full range of emotions, such as empathy, after they grow older and have more time to self reflect. They are like infants with full human intelligence who are driven by the impulse to eat humans and die too soon. Both Migi, who didn't consume a head, and Tamura Reiko were more curious about humanity and themselves and always tried to understand how the world worked. This caused them to develop faster than the others.