Ok yo people I think she is like totally not dead .^^
Why? well because :
She goes away of Zuko's room when she hears some steps. When she is leaving she puts a hood on.
Well goes to Zuko's room late at nigth when he is sleeping probably after or at mid nigth, she left, no one found her dead or anything. They did find Fire Lord Azulon or dead , as Azula said at morning ,he passed away last nigth , he died when Ursa left. She probably killed Azulon to protect Zuko and ran away.


as ya all saw she is very atached to Zuko ... after all

and that is why I think Ursa is still alive...

well that is all I have to say for now...
l8r
P-RG