Code Vein - Invading Executioner Boss Fight
After what it have seemed to be forever, I have finally managed to beat the Invading Executioner. I am not sure how long it took (I got stuck in three days time, grinding and trying to beat her with no avail) But I finally managed to do it thanks to a guide ~
If you are stuck with this boss, here is my advice:
Light clothing and weapons = Quick dodging
Blood Code: Prometheus
Use Attack Increase and Fire Increase before you enter and use Blade Dance to swiftly attack her, dodge like crazy and block as well, that's all of the advice I can give.