Here's the issue.

awhile back, as I recall, I was doing the Bloodline quest, where I just saved Serana from the sarcophagus.

I traveled all the way to Castle Volkihar, used the Icewater Jetty.. and Serana just wasn't there anymore right when I used it, and has been gone ever since.

I can't get into the Castle because Serana's not with me for the Gate dude to recognize her and open it.

is there any way to have Serana re-appear? I know she appears if you enter the Castle Volkihar Undercroft, but that's locked.

Any help is appreciated.

Uh, nevermind. She seemed to just appear randomly right when I went to Solstheim (Fast traveling anywhere else didn't seem to work)