Okay I see, all the outfits should be fixed now, I uploaded a new release. Let me know if there are any other things to fix
Edit: I upload updates here:
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I have found two little things and two important issues.
The important ones first:
1.) According to the Japanese wiki in order to get Rovissa's ending you need to talk to the old knight leader in Gruppen Castle when you can enter the Land of the Night.
He will give you an equipment called "shard of a sword" and ask you a question you translated as something like:
"Has your hatred for the demonlord changed?"
The answers are simply "Yes" and "No".
--> IMPORTANT: Japanese logic is different from Western logic here.
Japanese say "Yes, I still hate the demonlord." and "No, I do not hate the demonlord anymore.".
But Western people say "Yes, I do not hate the demonlord anymore." and "No, I still hate the demonlord.".
This is important because you need to answer that that you do NOT hate the demonlord anymore in order to be able to get Rovissa's ending.
So please change the answers to the question like this:
"Yes." -> No, I still hate the demonlord."
"No." -> "Yes, I do not hate the demonlord anymore."
2.) If you have completed the succubus diary (encountered, analysed and maxed out mood for all 100 succubuses) then talking to Sitri after the ending should give you a key item (some ring) that will transfer to other save files just like the "Fiction Ring".
But this ring allows Rovissa to then use all skills even without equipment.
It seems like this 100% trigger for the diary does not work.
So Sitri won't give you the ring even if you have completed the diary.
Now the small issues:
1.) Lars gets a skill called "Adjust" when he reaches a high level.
That skill allows the player to make their attacks weaker in case they have leveled up too much and still need to gather the info on weak succubusses for the diary.
When you use the skill you get a blue display in your stat screen during battle (like for other stat effect like Crisis or Incense) that display is not translated.
Also in your battle menu the skill is then replaced with a skill to undo this "Adjust" effect.
That undo skill is also not translated if I remember correctly.
2.) Rovissa can get a skill called "Passion" with equipment.
The description for that skill is not translated.