I haven't read the novel but I read some spoilers in the comments who said -spoiler- that after the other girl arrives both the brothers and the slave guy leave the mc and the only one who stays is the prince, still I didn't really understand if they were brainwashed or they left her on their own. Also as I said that's just what I read here so I don't know.
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All of other ml except for callisto have problems. her brothers treated badly.As for reynold, you can see in the previous chapters, (but he eventually become a reliable brother for penelope). Both Derrick and Eclis are yandere. Derrick is one of those disgusting yandere that I dislike. He hurts Penelope because he loves her. He wanted to put her in a cage (sth like that). Eclis later will betray penelope. And Vinter, is a good man. But he doesn't trust penelope at first, because he has suspicion that maybe penny is the ancient evil witch. He falls for her, but because he doesn't trust her, he loses the chance. Aaaand Callisto is the best man for her. He may look psychotic ( he is kinda haha) but he's the only one who's kind and genuine to her. He doesn't judge her and supports her in everything that she does. It may seems like he want to kill her now, but actually he's very attracted to her, he kept sending letters because he wants to meet her again. Yeah and later they fall in love with each other and got married. Penelope becomes the empress and they have a daughter :) (actually penny got pregnant first, then they get married hahah)
also wanted to add
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derrick and eclis get brainwashed by yvonne which is why they betray penelope. reynold took some time in taking sides but eventually he believed in penelope. towards the end when everything is over, eclis loses his memories of his time with penelope but still feels the urge to protect her so he fights for her in the shadows. he never got his memories back either bc penelope thought it would only do more harm than good
Well basically after the hunting competition, Callisto will be in seen all throughout the story now. When they met during the hunting, he asked her what is it that make her fall for him and then she said she’s not “in love” with him anymore. Then an accident happened with them being stuck together, they then accused Penelope of what happened to the prince. Then the prince really just became lovestruck with the MC without them noticing it. Then another thing to look out for is Penelope’s birthday. And yah, start hating yvonne now but forgive her on the later episodes (prolly on the last). I really don’t wanna tell the whole story tho ahahahaha if you got time, you can read the novel, and the side story of the novel is really cute.
omfg Callisto will be there. and let me tell you, he may seem like the craziest dude but nah, he’s the most normal one. (づ ̄ ³ ̄)づ