Did I ever tell how obsessed I am with the relationship between Celestia and Luna? Gurgh cutie pies. I could go on such tirade about them that you would probably attempt to put both of us out of our misery.
*stretches* Okay so I feel so bad for Celestia because she got shit rained down on her just as bad as luna. She got swept into being the wise leader without much choice of her own. In the push for her to be wise and all knowing her sister was forgotten. Like in the song lullaby for a princess, the limelight created this perfect world that didn't let her see the damage being done. She wasn't even able to fix her mistake, all she could do in the rush of the moment was banish her sister. She had to wait 1000 years for SOMEONE ELSE to fix the mistake for her. 1000 years of regretting everything she had done and torturing herself with "what-if"s and "if only"s. AND LUNA I know what it's like to have a shining star for a sibling and I know what its like to lose your shit and pay for it big time. I know what it is like to have people look at you waiting for you to snap again because of it. Luna only ever looked up to her big sister and she must have tried desperately to understand that neither of them had much control over their situation. For Luna to be pushed to the point of attacking her sister and refusing to let the sun rise she must have been pushed to the brink of her sanity. The anger and frustration she carried for probably thousands of years just ate away at her until there was no more her left. There are some who believe that Luna was "taken over" or some outside influence made her turn into nightmare moon, but I think it was all Luna. Luna willingly became nightmare moon almost as a cry for attention. She was so desperate for her sister to recognize her and respect her that she turned to drastic measures. It must have KILLED Celestia to be hailed as the conquering hero upon defeating Nightmare Moon, knowing that somewhere in that ball of rage, was her little sister. And that her little sister was angry with her, and for another 1000 years her little sister would be angry, frustrated, and scared. Locked away in the moon with no-one but herself to argue with, and every right to hate Celestia. Celestia must have been terrified that Luna would never forgive her, even with Nightmare Moon defeated. Agh my heart just breaks for the two of them because all siblings fight, and all siblings have their fall-outs, but because the two of them are Royal siblings the pressures are increased ten-fold. Everyone thinks princesses can do what-ever they want while in reality they are expected to react certain ways, act certain ways, be this, be that, but never are they able to be themselves and it must suck- should I stop here or keep going?
I RP a cannon Celestia page on FB and have developed my understandings of her character in many of the same parallels that you have outlined here. To be honest, Hasbro could create an entire spin off series involving just Celestia and Luna. There is a mass of potential for some amazing stories from just these two alone and I would love to see some of my own theories cannonized in an episode/series.
If you have more to share I'd love to hear it. Although maybe it would be best suited for a journal entry and not a reply in comment here. ^u^