Wow, that writer clearly can't be bothered to do any sort of progression. 3 (or 4?) poison attacks and you are immune? Listen, if you play a MMO friggin' everyone would be immune to poison. And you get a unique super armor set (complete) exactly for your class for defeating the first boss? Rite. ^^
And, yeah, as everyone else points out, it makes no sense she somehow can defeat things. I guess Bite attacks are "penetrating" so VIT stat doesn't matter or something? Still. Put a bit of effort in this, lazy author ^^;