Has "girl raised by death" vibes.
One of the things that bug me about these "reincarnate into grown body" type stories is the MC gets used to their body so quickly. Any kind of intense physical activity would require a lot of muscle memory that gets developed over time. Yet MC is apparently able to perform at high level in a short amount of time, skipping all that neural pathway optimizations. The only thing we get is that hand-wave "this new body needs time to adjust" in ch 1. Ok, you have all those skills and all, but ya still need to develop sufficient body strength, joint flexibility, visual acuity, etc.