We know that home world gems under Yellow Diamond have a yellow diamond symbol on their uniforms:
You know who else has a yellow diamond on their clothes???
That’s right, it’s Kiteman!! But wait, why isn’t he wearing the same uniform? Cause he’s yellow diamond duh he can do whatever he wants. Where is his gem??
If you take a closer look, it’s obviously on his forehead. He summons that helmet with it. Why is he mostly green then?? Its all an elaborate ruse to throw everyone of his trail. I mean, Who would expect yellow diamond to be hiding out in batman the brave and the bold? Exactly
You’re welcome everyone for this amazing revelation god I’ve got like A+ detective skills I could be like the Riddler or something but not Batman cause he’s all ripped and stuff yeah