Honestly, the biggest challenge is often the pack itself. You're born into this structure where loyalty and tradition are everything, but as a princess, you're expected to uphold it while also sensing its flaws. The old guard wants you to be a symbol, a broodmare for a strong alliance, not a leader with your own ideas.
I've read so many where her struggle is fighting for recognition in a council of older, male alphas who dismiss her as too soft or too human. The internal politics are brutal—every cousin with a claim watching for weakness. And then there's the literal monster at the borders, or the rival pack, which she often has to solve because the traditional methods are failing. Her own power can be a problem too; a latent alpha aura surfacing in a 'princess' destabilizes the whole hierarchy. It's exhausting, and she's usually utterly alone until she finds her own circle of outcasts.