>>1759558I really like both of them, as I think it is the combined efforts of both siblings that contribute to the progress of their relationship. Kirino is the catalyst to that progress by asking for life counseling (time and again) and Kyosuke responds to that by listening and helping his little sister with her problems, regardless how difficult. That of course eventually leads to significant development of character (especially for Kirino), but much of that does not yet exist in animated form.
I've always been curious how their relationship got as bad as it was. I haven't really seen it explained in detail anywhere, and the different way the two see each other makes me wonder.