You both missed parts where it's explained parents and Leon spoiled her rot, then act surprised about her narcissistic personality. She had her fair share of abuse afterwards and got beaten to death, just to end up isekaied to an even more abusive household that was deep in debts. Leon compared to her had smooth sailing...
She isn't fully redeemable, but can understand her actions.
It's right there in manga, better explained in LN but still it's a nice adaptation.
I surely did; I don't remember that. I don't doubt it however, because her reaction to finding Leon indicates that she--at the very least--considers his presence
very comforting; this, especially because she's (ostensibly) facing the wall at this point--she probably imagines onii-chan will make everything better, and she's already demanding Olivia "give him back".
That said, I still don't think any of that means much. She went through all that--terrible as it all was--and learned
absolutely nothing, even to the present moment. Marie has
only negative personality traits, which includes a total lack of self-awareness; a recent, absolutely flagrant example of this was when she "suggested" Angelica and Olivia beg on their knees--before a group of her equally vicious peers--for what it was that they sought from her. She knew well what society was like in that world, and what kinds of people existed in the milieu of peerage in that world as a result. Of course Marie knew--that, along with how she knew the two were desperate, was why she "suggested" they beg her before those people in the first place. Then, when Angelica and Olivia actually go and do it, not only can Marie not believe they would,
she expresses disbelief that her peers are treating the two the way they were. Perhaps you understand her actions, but she
definitely doesn't. Odds are stellar that she doesn't care either, and my money's
easily on that.
Marie, quite actually, gives the reader nothing positive to work with in her personality. That said, the very idea that her admittedly hard life (part of it is her fault, on top of that) would absolve her of responsibility renders her past nothing more than a sob story. It does, that is, to those who aren't pedophiles. The lolicon appeal is the
only thing she has going for her, and it's 100% by design: it's been established for years that lolicons will excuse
any sort of behavior for "cunny"--just look at how Louise beat the tar out of Saito in
Zero no Tsukaima, and how the Shanaclones continued strong for about a decade after that. (That's not even to speak of how prevalent and close to mainstream lolicon has become, itself.)
I honestly didn't even know there was a spinoff based on her, so... But now you have me curious too lol
Regardless of how tragic her backstory is, how'd she get popular enough to warrant an entire spinoff, when she's basically been at best really annoying
Wonder no more; that last paragraph should thoroughly explain why she has such a spinoff.