Kai is Mabel's twin brother, shunned by her for his sexuality. He identifies as bi curious yet knows it's not the truth - as he'd much rather be with a male over anything else. He's sweet and very energetic, part of the "dumb trio" along with Elias and Ace. He's very open minded and hates to judge people, and gets upset when people judge him over who he chooses to love. Yet he knows, his friends wouldn't ever judge him. He constantly tries to get Mabel's attention and is shut down each time, soon growing tired of it and deciding it's better off this way.