Explanation: Yoru and Eros

Yoru claims to hate CSM. There's definitely a kernel of truth to that, since she does have legitimate reasons for wanting to fight him.

However, it should be noted that normally, people avoid things they hate. They don't go chasing after them. And if we take Makima to be a case study for the whole group, the Horsemen can and probably do hold somewhat contradictory feelings towards CSM. Makima wanted to win against CSM, since then she could control him, but she also liked the prospect of losing to him, and being erased by him.

Call me crazy, but to me, Yoru seems like she's might already be in love. It's just that, her view on love is too conceited, and, being a devil of strife, her fixation on seeking conflict is too strong, so she hasn't realized it. This ties in to her powers a bit, since her selfishness is also part of the reason she can't produce any strong weapons of her own. She's not able to put herself in the other person's shoes or to prioritize anyone other than herself, which means she's not able to give herself the context to feel things like love or guilt.

Explanation: Famine, Envy, and Philautia

It's still to early to get a solid read on what her attitude is towards Chainsaw Man, but we have a few clues. She wears earrings styled after his starter. Her powers should be centered around the feeling of admiration, and it seems like she's surrounded herself with like-minded CSM fans. At least two of these fans, Yuko and Haruka Iseumi, idolized CSM so much that they have tried to "become" him.

Famine's powers are entirely directed outward - unlike her dark counterpart, Yoru, whose powers are entirely self-centered, the "light of justice" only seems to give of herself. Famine's "selflessness" might explain why she seems so detached or unemotional. She doesn't care about herself. At least, not on the surface. Obviously, this is just as unhealthy of an attitude as Yoru's selfishness...