InuYasha Manga Dub - 'Tetsusaiga' & 'The Dark Castle' (Chapters 12-22)
sunnydcapri for Lady Izayoi (Mu-on'na)
Izayoi was shown to be a kind-hearted, gentle, and soft-spoken woman who cared much for her family. She was always portrayed with a solemn, yet graceful appearance.
The Mu-on'na impersonates her to the extent that her own son believes it to be her, so it can be inferred that she would carry over these traits, though not to an extent of autheticity.
[InuYasha is trying to save her from Sesshomaru, she is in chains.] (Pleading in pain) Inu...Ya...Sha... Please don't trouble yourself. I've been dead once anyway.
[They are safe once again, and InuYasha asks her where they are.] At the crossroads between this world and the next. I shall return to the otherworld from here. (Motherly and sweetly) InuYasha... You have grown up splendidly. You were so small when I passed... Forgive me. You must have suffered so.