Mafia 101. Disputed Island

isolation from Levi? But it's shown with the player's nickname. And here, it's either a fact of some unclear non-disclosure agreement, or a literary element.

Well, yes, it was displayed with the nickname "Menta." As a literary element, it looks very strange, but in reality, the non-disclosure agreement more or less fits only as a hint at the gender of the isolated role and the result of the isolation in the sense of depriving/adding a voice.

Added 2 minutes later

If the answer to the first question is a lie, then the killer has less than 5 non-disclosure agreements. That is, the option is actually impossible.

It depends on the wording of the question. If, as I assumed, it implies that available ultimates are also included.