i don’t think dion and jeremy should be in the same category either jeremy seems to have a genuine sibling bond with roxanna i’d say it’s more like jeremy>dion>fontaine
i agree with you except from dion though. i dont think dion has any sexual attraction to her in any incestual way but idk if he loves and respects her due to his past actions and words. he enjoys when she cries and wants her to cry meaning he is quite sadistic. Meanwhile jeremy cherishes her safety and is protective over her.
i think dion respects roxana and finds her interesting bc of the whole mission-gone-wrong event in their childhood as well as other times they were competing. no matter what she's feeling, she always knows how to handle everything in the most reasonable way; she doesn't even rely on anyone in the mansion. so it must be frustrating for him and cause him to see roxana as a proper opponent. idk if i could explain it clearly. also, i agree about jeremy!
yes, it could seem like that! dion and jeremy have different ways of expressing themselves.
don't put dion and jeremy in the same category as that fontaine guy. they are fucked up in the head too, but the way they view roxana is not the same perverted way as him. dion and jeremy respect her, and love her as a family even though their situation doesn't allow them to act like proper siblings. that two just doesn't know how to be normal.