Your advice is very much appreciated! and this being aid I REALLY don't want to godmod anypony I just like the look of the horn but am more partial to pegasi mares. And she is by no means a mary sue. She is an outcast. No pony really likes her, though she is freinds with the mane six. Her goal is only to be accepted. I dont care for power lol. She is a gray pony with a dishwater blinde and brown mane and tail, like my real life hair, and a crescent moon with a white wolfhead coming out if it as a cutie mark. And as for Red Wing he is more of in Big Macs position he has a name and he's there but not overpowering. And he is still under Shinings rank. He's technically just a general in charge of a specific battalion lol. I dislike mary sueing my OCs lol.
To add to that I was thinking of making up a peice if equestrian history in which alicorns were very common but were causing problems by being too powerful so laws had to be passed to slowly make the trait recessive in all but mares who were to be leaders because while they were very powerful it wasn't in conjuction with the mighty physical strength of stallions so it made it safer. My pony would be an alicorn by a quirk in this rule, which Crimson Flame would help her discover in an old book while she tries to help him learn to use magic.