Why Regina do that towards all the male characters in the first place, again?? is she desi...

She wanted revenge, I believe, against the empire. I think they destroyed her country so she did all that to the three guys but it kinda backfired because they used Lilliana as a hostage to keep her by their side. The sisters were trying to rescue them from the three obsessed me but it seems that none made it out alive from the bits and pieces Lilliana gives. She killed herself this time around because she was trying to prevent the same disasters from happening again. She was friends with the sisters to begin with so that how Lilliana got involved in the fist place.