*dem hashtags* [quote]What is the explanation of Master Chief receiving the gifts from the Librarian if she is dead?[/quote]At some point around the time that the Ur-Didact composed the humans of Omega Halo, most likely before, he sent out a call for all Prometheans to aid him at Requiem. One of the Prometheans that arrived was a female called Endurance. She was supposed to be the Ur-Didact's wife before he found the Librarian. Endurance was given some control over the operations at Requiem while the Ur-Didact carries out his plans. When the Librarian arrived at Requiem after following the Didact, she came across Endurance. She convinced her that the Didact was not well, and wasn't in his right mind. For the love Endurance had left for the Didact, she decided it would be better to help the Librarian to help the Didact. Endurance agreed to the Librarian's plans and she commanded the mechanized Prometheans under the Librarian's orders. In the mean time, the Librarian imprinted herself onto Requiem's systems to aid an protect Humanity once they found Requiem. [quote]Where is she, and if she's dead how is this happening?[/quote]She's just an imprint of her former self. Living memories essentially [quote]Promethean Knights were composed humans, but what are the Crawlers and Watchers? Their dogs and birds?[/quote]Unknown. We'll probably find out or get a further clue in the Halo 4 Visual Guide.

Librarian left an imprint of herself on Requiem before she stranded herself on Earth. She had intended for the Ur-Didact's mind to be healed by the Domain so he could awaken to be the steward of humanity's ascension to the Mantle. Watchers are composed children, we don't know what Crawlers are though.

[quote]What is the explanation of Master Chief receiving the gifts from the Librarian if she is dead? [/quote] She copied her consciousness into a machine. [quote]Again, in Spartan Ops Halsey gets to the Librarian. Where is she, and if she's dead how is this happening?[/quote] Another copy. [quote]Promethean Knights were composed humans, but what are the Crawlers and Watchers? Their dogs and birds?[/quote] Maybe. Maybe bits and pieces of people that couldn't form a Promethean. Maybe pure artificial constructs. Too slow LordofAdmirals.