Fighter and Warrior were childhood friends, so going by anime clichés, he would have been her eventual love interest.
So...
She sees her friend and likely future love interest brutally reduced to chunky kibble. Gets beaten nearly senseless. Stripped and repeatedly raped. And, also going by anime clichés, losing her virginity then and there. Mentally broken, and perhaps permanently so.
To borrow a quote from a thief in another world, somethin' out there is piss-drunk mad at her. I don't know who or what it is, but she's been cursed.