To be frank, it's slightly disturbing.

She looks humanoid enough, even able to feign as a human without her wings and horns, a very tall one, but still feign. However, underneath the armor or clothing, she looks different.

Her anatomy is better built for being on all fours. Her legs are built more like a kangaroo's, being short until the knee, then the rest of the lower leg is considerably longer and angled. Her ankles, usually covered by boots to hide the odd features, look unnaturally bent. In short, she has more animalistic footing.

Her spine is bent like a cat or dog's, being meant to be hunched over. She can handle standing humanoid for long periods of time due to her bones being much more durable and her spinal discs are as well. In fact, it could be the strongest part of her. Despite that, it is more relaxed and she is more agile when hunched over or on all fours. Especially removing the mild discomfort standing up has.

Her forearms are longer, than the rest of her arm, and they are built to grab or slash, and quickly retreat. Much like a Praying Mantis. This is why she often uses daggers if in close quarters combat. Stab or slash, retreat arms, dodge or block an attack to the chest with said arms.

Jawline is made more like a snake's. Or dare I say, an insect's. Yes, it can unhinge and split apart at the chin. She doesn't do that often, thankfully, but she may occasionally do the action to terrify a foe. She also has mandibles inside her mouth, but those often stay hidden underneath her cheekbones. Again, not often used for eating, just for scaring. However, they are poisoned, just in case.

None of these features are noticeable if you aren't intensely observing her or she doesn't have armor.

Visual, just in case you're more curious. I did not include the jawline. Sorry for the bad quality.