Sure! I'm playing the paid version and using the seducer class. I believe before I saved, the player character was at zero HP but Nii still had some health
I'll take a look, but is posible that the character will keep triggering a game over, you don't have a backup save? Is important to keep multiple saves when playing the Seducer, as mentioned when selecting it, it's still under testing and you may encounter bugs.
Normally when dying in combat, as long one character survives the others will be revived with little hp, however, maybe something broke and the seducer class didnt got revived, so when Nii left, the player is left alone with 0 hp and causing a game over.
I have planned a patch with multiple fixes but it will take a while to prepare (and fix this too in the process), so if you have a backup save it may be faster to just load one rather than waiting for the patch.