Eredan's World

Okay I got 1,2,and 5 by using Noz: Archmage Anryena, Anazra, and Naya. In the ELO channel.
I: "Ishaia is dead?? That's terrible, we should tell Marlock."
II: "What? What say you? Ishaia...dead? How did this happen?? Well...Let's stay calm, there must be courtesans with more information."
V:" Here are the clues you have collected thanks to the Courtesans:

-Ishaia's death wasn't natural, there is a high chance that this was murder.

-Strange things are happening, Nehantists would be at the center of this plot.

-Marlok has created an orb of divination in order to see flashes of the past, but the picture is not clear, the assassin is a woman."

I got 4.2 aka 6 by winning in Level Rooms with my Noz deck.

IV:  "It would seem that Ishaia did not see this coming at all and that she knew the person who assassinated her."

Number 7 I got by switching to my courtesan deck which consists of Angelica, Hasna, and Kimiko.  I lost and still got it.

VII: "The blue fabric definitely comes from Noz clothing and clearly belongs to a woman. We will find this assassin soon enough."

....I don't have any other.  But, from what it looks like Naya did it imo.