She's in this for the job, a girlboss.. I'm not partaking in any of your arguments about her being undignified with her interaction with other male characters but if I were her I'd like to taste each of those mouth watering male characters tho... But I'm not supporting that demon's behaviour towards the MC.
Remember what that other sus guy told the goblin? Not minchan's soul is broken into fragments? Maybe something happened 1,500 years ago that lead for minchan's soul to be like that... Hmm maybe he trapped the goblin in the mirror to protect him and thus he died but his soul was broken into pieces.