2nd: Flein was an "intruder" and got his stats cut not because he's a PKer, but because he jumped in late (when other players were already beaten/exhausted). "Anyone is free to jump into the fray if they wish, no registration necessary. Though a penalty will be applied each time you enter."
And...
She'd regularly go on suicide fights against strong monsters when she was done for the day so she wouldn't have to worry about the penalty for dying, so I figure it's just the first time she went up against something she was truly helpless against.