Winx Club headcanon: the only reason Diaspro has ever been hostile to Bloom is that the latter turned out to be a princess.
She had no problem with Sky shaking it up with a random fairy, their match was never based on love but on politics and this Bloom girl was powerful and good looking, with just some training in proper manners she'd make an excellent concubine and provide an excellent cadet line for the future, maybe even direct heirs if Yoshinoya got Diaspro before she got him. The problem was more than Sky had messed up and it would take some otherwise unneeded effort to get Bloom to go along with it and make the situation socially acceptable.
But no, Bloom had to turn out the Princess of Domino, and a princess couldn't be a mere concubine. She could only be the proper wife... And Diaspro had been raised to be the next Queen of Heraklyon, she couldn't let this princess take away her entire reason for EXISTING. She had to do something to get her out of the way, or die trying.
Yea yeah yeah!!!
Honestly my au has this similar in that like.
I wouldn't say she's "okay" with him having a side-girl or concubine but if he really stands his ground on it then she'd allow it begrudgingly
But even if he wants to break off the engagement his parents would never allow it.
And yeah she's losing her mind because her only purpose in life was to be Sky's wife. What does she do without that?
Thankfully my au diverges where she decided to discover herself instead of committing murder












