I don’t get why she’s blaming herself?
Nothing she could’ve said or done would’ve prevented it...
Only in the case she knew he was unsettled about this matter(that he came to know about it in a bad way) or had he shared his worries/anxieties, or had they discussed the matter previously- only then could she have “talked it out”, or calmed him down....
In this particular case she has nothing to regret, other than - being more open about thoughts to your partner/ talking more , discussing things more
In future to prevent any such occurrence, that’s the only option she has-
She has to fill in the hole, their lack of communication has created
They belong to different worlds literally, and to think he’s a demon king, the foundation of the world along with Gaia (the god)... he’s like the VVVIP, no- the most important person alive! In the whole world, and he’s also treated as such, of course he’d get carried away!
No one’s even there to reprimand him on his mistakes, no one’s as powerful as him, or courageous enough to criticise or deny him ( well, other than our MC Misuzu Kanzaki, who got him in 1st meeting, when he played around with Noel). He’s spoiled, basically & only she can “treat” this (hail black healer-sama! Lol)
No, srly I hope she gets him better, cuz if he gets crazy- it’s the end of the world!
They should probably introduce psycho-analysis and therapy in demon castle, then the king ( who always tends to get “mad”, will probably bear better) - another hope that I hope Misuzu fulfills ?