Here's a question I've been pondering, but I haven't had access to the supplementary materials so I'm wondering if it's been answered there.
My question is why is Jam so darn good at manipulating Chi? The most information we get is that she's naturally disposed to using it, but I'm not entirely sure that's a good reason. She seems to be nearly as adept at using Chi and Ky is at using Lighting, another form of magic, but Ky's also a warrior and has a piece of the Outrage. Jam's just a chef who happens to kick butt. Baiken also uses Chi, but only clearly in her dust, and it seems rather weak, especially when compared to Jam's manipulation.
So I'm wondering if in any of the voice dramas or manga this is answered. Right now my guess is that her hairclip might be a piece of the Outrage. Angi's fans show that they clearly don't have to resemble weapons, and since Chi seems to be a type of magic that is best used through hand to hand combat, it would make sense to not be a real weapon. I'm also aware that a headband is usually used to help one concentrate, so the hairclip could be something along those lines.