Harrison, Jack, and Violet also share Mandy (Sosie Bacon), their aide, who works with them throughout each day and holds morning meetings to discuss their goals for the week. Extremely skilled at what she does, Mandy can push them towards their goals without pushing too much; through these close bonds, she's able to see how they view the world and how the outside world views them. Being able to see both sides allows the audience to see that, on top of how much the world needs to walk around with a bit more compassion for people.
Though Harrison, Jack, and Violet have a few overlapping qualities, the most apparent of them all is their shared feeling of just wanting to fit in with everyone else. The word that gets thrown around the most in this show is that infamous one: "normal."
Each character is told at various points that their differences are the best things about them, but most of the time, all they want is the opposite. In an effort to appear "normal" to someone he likes, Jack finally asks Mandy, "Is it obvious to everyone that I'm not normal?" He has felt different his whole life, and it seems clear that he's sick of being told that it's better not to be normal. When Mandy responds to Jack and says, "For what it's worth, I think you are such a beautiful person that you shouldn't have to hide who you are," Jack is clearly stuck in an internal struggle and simply says, "That makes me want to throw up."