I know I was the last one to guess, but can I guess again?
Because then I would have to say Ellone

Myself,
The victim of the preceptor, Odine wants to observe her, or maybe reffering to Adel
Avoidance, she goes into hiding
The dilatory assassin, could be Laguna (SPOILER)when he tricks Adel
The daedal burg, Adels prison/tomb?
and The red saviour, as revealed (thanks to me ): the ragnarok

Am I all? No.
Am I some? No.

Mayhaps, in clearer light
and in array
my true self will come forth,
as I am in all.

I am the beginning. and these later paragraphs...well I don't know about these...

Edit:Just saw the hint about it not being a main character...