Jaw

Like other parasites, he can think logically and take the right action when the time needs it, shown when he changed Uda's vital organs, so he can eventually survive from Shinichi's parasite mother's attacks. Similarly, he puts little importance on names and gives little attention to being renamed from Parasite to Jaw. However, unlike other parasites, he is often seen smiling and appearing generally gregarious. He is also readily willing to work with Shinichi and Migi because of their similar situations. He has stated he prefers to use all of his body when speaking, even though it inconveniences Uda by not allowing him to speak. Despite his emoting, he has little respect for Uda's sensitivity and tendency to cry, stating that it is something unique to humans that he doesn't understand. Jaw learned the language by watching movies with his host (who usually cried during the films). It's noted on multiple occasions that he can be rude, something that seems to increase as the series progresses as he often insults or denigrates his host. His tendency to smile and emote may also be a mimicry of the shows they watch.

left|thumb|169xJaw partially emerged Jaw has blue eyes and sharp teeth. Due to being a parasite, his appearance is malleable. Most of the time he is camouflaged as Uda's lower face and upper chest. The way that he emerges from his host's neck also gives him the resemblance of a goiter.