I love your story, it has been something I have been talking about for ages. A game where I can play as a "monster" not only that but I get to play as one of my favorite ones. I can't wait to see where this goes. Also not to mention the writing is so good, especially given that you are writing from a perspective of something that is humaniodish but not human. I know some writers in my personal life who struggle with writing form the same perspective that you just handled perfectly. The details of having a nest instead of a bed and finding chairs uncomfortable and don't even get me started on that fight scene.
the only weird thing was that my height was only 5"2, but it kept talking about me as if I was a towering creature tall enough to look over most creatures. I just attributed it to the character standing more on their snake half when standing still and talking but for things like the scene when the party was walking through town it read, to me, like I could see over characters like Daniel
finally I should leave my lamias description that i made for your story. idk why I just want to. I picked unarmed and stealth as my two first skills, then for my characters appearance I chose hip length light red hair, I imagined that to be a kind of coppery ginger hair. With gray eyes, and sapphire scales, I felt it contrasted the light red hair and it would look great. then for the clothes I chose the goth/punk choice.