one of my favorite ven & vani au ideas is where like. after some of the KHUX stuff comes to light and they find out that vanitas isnāt just half of venās soul, but also a āreincarnationā of the original darkness that inhabited venās body, like. ventus figures āokay what if he acts on demon rules. what if i had āsold my soulā to him back then and now itās like, hisā. and instead of freaking out heās like āhow can i use this to my advantageā and figures āif i sell my soul to someone else will vanitas try to defend his āpropertyāā and it actually ends up working. ursula? dealt with. dr facilier? gone. bill cipher? extend your hand for a handshake and ventusā attack dog is on you. ventus is using his own soul as leverage and vanitas is just āthis is MINE no one else TOUCH ITā and everyone is waiting for this to blow up in venās face but somehow it doesnāt. ventus just keeps trying to sell his soul and vanitas keeps coming out of the shadows to rain hell down on anyone who tries to make a deal with ventus.