Jaryls tend to be quite skeletal but do not let their weak stature fool you. They can still grow plenty of hair on top of their skull faces.
Once you establish a deeper connection with a Jaryl, it will unlock his other abilities, including but not limited to quoting lines from obscure movies, extreme video-gaming and chain-smoking like a badass. Be careful when handling a Jaryl in this mode.
I just lost to that guy in a trivia, he was quite a jaryl.