The Third Diary Password?

[夙兴夜寐晏某人]

So English is not my mother language so I may miss something when reading roughly due to my tiredness of reading a foreign language. But I really cannot remember where the hint of the third diary entry is. I checked the guide but I don't remember a Solaris scene with people toasting the principle? Or is there something I didn't do in game so the scene was not triggered? Thanks a lot for answering I literally can't sleep without this question solved.

[夙兴夜寐晏某人]

Originally posted by ⋆ 𝐳 ⋆:

If I remember correctly, when the headmaster announced someone did B&E into his office (17/5? I think) after the announcement he said something like "Solaris...?" and the whole student body (except Palmier) replied with "Aegna."

So that's supposed to be the clue to the password. At least that's my take.

God it was that early?? No wonder I forgot about it. Gonna check in game and THANK YOUUUU!