No; sorry. Think later in the timeline.

Wait, it's not Aslan, is it?

No, although I can see how it would fit Him (except for the last line...)
I haven't made one this hard in a while! How about a hint:

If you should listen, listen with care;
Your own discretion speaks how you shall fare.
If you will ask for an answer, beware,
Lest secrets you'd rather not know be laid bare.
Who am I?

Oooookay, that kind of gave it away, I think.

I must be really dense. *takes another blind shot in the dark* Puddleglum?

Nope, sorry. Not even in SC.

I hesitate to ask, since it's a what and not a who, but it's the only other thing I can think of: Coriakin's book?

Ding-ding-ding! That was it. 🙂
(And I almost said "what" instead of "who", but I thought I remembered "what"s being called "who"s before to throw people off.)

Oh, and I just noticed that we recently passed the 10,000-post mark in the Narnian Fun and Games board!

Oh, so I should have asked sooner, haha!

Raised as the least, yet raised to the first;
Born to misery though born of mirth;
No greatness in deed but when need was worst;
Of greater bliss, through all this, I was not cursed.
Who am I?

So all I can think of is Strawberry/Fledge?

Huh. That almost does work. But no, not Fledge.

Are you Caspian?

No, not Caspian.

As I discovered my future, I learned of my past --
all too much, so soon, so fast!
But here in the role for which I'm cast,
I'm glad to be home, home at long last.

Sounds like Prince Rilian after his disenchantment.

Oh, dear, I didn't mean to make this one so hard! 😳 No, it's not Rilian either. I'll bold the lines I think contain the greatest clues, but if it's still too hard, I'll provide more clues.

Raised as the least, yet raised to the first;
Born to misery though born of mirth;
No greatness in deed but when need was worst;
Of greater bliss, through all this, I was not cursed.

As I discovered my future, I learned of my past --
all too much, so soon, so fast!
But here in the role for which I'm cast,
I'm glad to be home, home at long last.

Ah, but the hardest ones are the most fun!! 🙂
Hmm...Shasta/Cor maybe?