like Fueru said, the colors most likely mean that. Also its just kinda hinted at (i cant remember if they ever stated it directly bc i didnt read the side stories yet). That's why he hated it whenever she called him brother- because he didn't want to be her brother but her lover. Also the whole thing with the bird that looks like her.
I think the likeabilities arent rlly accurate. Ecklis' likeability is really high- but he doesnt truly love Penelope. Callisto likes/loves her, but his isn't even in the 90s.
I cant remember if they ever stated it in the novel, but Derrick didn't like it whenever Penelope called him "brother"/Treated him as a brother, so maybe that's why his likeability is also quite low, but he had liked her ever since she got adopted into the family
Yeah, Eclis and Penny's relationship is fucked up. They're both using eachother this that, but let's not forget that Penny just sees them all as characters in a game- because that's basically what they are.
Girl has her priorities straight since day 1: which was to LEAVE that game as soon as possible, I can't blame her for what she does because all she wanted was to survive. She's been planning on leaving since she transmigrated so ofcourse she won't give a damn about using Eclis for her own good.
Ofcourse this doesn't justify shit tho... but I can understand Penny's side much more than Eclis' (I've also read the novel so maybe thats also why..) though let's not forget the real weirdo here is "Mr i'm in love w my adopted sister"