
Yeah~ therein lies the problem.
But I don't think it's solely hypocrisy or martyr complex tho.
It's just her self-esteem as a surviving royal is so low and cemented in her brain, as well as her ungrounded belief in the survival of a sister, that she fails to see the monumentally bad consequence of losing her life in battle -> immediate defeat of their army who, really, was only able to hold itself together with her appearance -> more death of her citizens
And thus, fail to realize there's another option -> risk someone else's life & whose death will not significantly impact their campaign for survival
*sigh* I hope this isn't where a deus ex machina comes in & she becomes the bird again, 'coz that won't correct her crucial misconception about her role as a surviving royal (unless the author can come up a good situation where she still does even during/after the deus ex)
What about disguising one of her maids?
Dress her in royal regalia, cover her head with a hood and her face with a veil, & surround her with a battalion that would normally escort the princess?