I'm at about sequence 7 in Brotherhood and as I exit the animus and look upon my fellow assassins, Lucy seems to have disappeared. She went outside of the assassin tomb/work area once before but she was just outside the entrance to said area. After some sweet talk, she goes back into the tomb. So yea, my question is: Where did Lucy go?

She probally had to take a shit.

The sky?

shes in a corner crying that they made her ugly in AC2, shes been there for a year now. its sad

I had the same thing happen I gave up and just went to sequence 8 and she showed back up, maybe she had to go ask the developers why there isn't a "Load Last Checkpoint" button.

I had the same thing happen and I couldn't find out where she went to. I just gave up as well after running around  monteriggioni for ten minutes. As far as I could tell it's not really important, then again I wouldn't know as I don't know anyone that found her. 

she was roaming about tryna find the source of the evil footprints outside of the villa

Read the emails, she was resting in her room.

The sky?

Found her outside looking at the moon. 

" @mylifeforAiur

The sky?

With diamonds? "

Turn on Eagle Vision outside. Looks like she goes somewhere hidden. I've not finished the game yet so don't know :x

Ah, shit. I never had that happen. Makes some stuff clearer when the game ends

Ah, shit. I never had that happen. Makes some stuff clearer when the game ends

had that too, shes just outside , go talk to her

Two possibilities are that she is still in her room resting as stated in previous email or SPOILER ALERT, She is off selling you all out to the Templars cause its later revealed she planned to betray the Assassins to Vidic!

UBI would like it if you didn't worry so much about what takes place outside of the animus. So just jack back in, and try not to think about it.