so its a bit of a spoiler if you care to read it (i dont recommend) but its because she's moreso her cousin than her sister

idk about the anime but the webnovel was one of the first ones doing the "isekai for girls" thing, the start of those iterations. Meaning that by now there are quite a few otome isekai's out that critique the whole "i gotta appease my violent dad into not killing me/other kids" thing that this does

its actually really funny like i respect it