So I finally choose to have Edwin in my party. Yay me. Guess again. Edwins' quest must be the most bugged quest in Bg2.
He doesn't talk to me when something happens, I must use the "Force Talk" to get dialogue options. He never told me that he deciphered the first part. How did I found out? Force Talk. Then and only then do the dialogues start. Same with the second part of his decipherring the Nether Scroll.
Finally he changes to Edwina. Again, only via Force Talk. After countless days of waiting for Degardan he finally showed up. I protect Edwina, Degardan leaves. After awhile he shows up again and this time it's battle time. After killing Degardan Edwin doesn't say a word. Nothing! Again only via Force Talk I get dialogue options. And guess what? He still has the female voice set.
And to top it off, Edwin suffers from the Stutter Bug after he changes to Edwina. When Degardan changes him back to his usuall form again he still suffers from the Stutter Bug. Edwin is doing the Moonwalk throughout Faerun. One annoying bug I tell you.
If only there was one modder that would fix Edwins Nether Scroll quest then that would make me a very happy camper