[n0m@n]

Oh she's nowhere near as 'that' sister from Seven from being an villain.

Spoiler for Marie:

Like everyone knows Marie, the girl who achieved her harem by stealing the 'encounters' of Olivia (the main character of the first game), is Leon's sister in the previous life. She finds out that Leon is her brother in her previous life during the second half of the third story. Once she finds out Leon is(or was in this case) her brother she would lose all the hatred she originally had for Leon and simply cries/begs Leon for help every single time in terms of money problems due to her harem boys spending/losing money all the time..... So they pretty much have a hilarious brother/sister relation from the end of third story onward. Marie who keeps on begging for help. Leon who tells her to get lost but ends up helping her. Leon would end up looking after Marie and her harems from then onward despite Leon's dismay.... For fourth story and fifth story it takes place in another country. Leon goes there as a transfer student and this country is the setting for the second game. The one who goes with him are.....Marie, the five idiots, Karla, and Kyle. All of them part of Marie's group. Though they serve as a comedic relief they do serve as being useful for Leon.....I think.... Even at the end of fifth story when Leon returns the the Kingdom and becomes a Marques (due to the King hating Leon) he falls into another shit hole since Marie and her group would continue to follow him like a cursed item... So they relation will continue.

And don't expect any cute sisters in this series. They are all sluts and bitches lol. Whether it's Leon's sister from previous life or current life. So no incest or any crap like that. The sister(s) simply serve as a comedy in this series.