@KyuMazu Well, both Isuta's and Asuta's dream is to 'serve the red heavenly king, the one they revere.' However, apparently only Isuta thinks of her as her 'heart's greatest desire.'
I just find it kind of amusing since it's not even hinted at in the main story anywhere, and if the sentiment
isn't love, it's a rather hilarious way of describing it in English. Like, if you're gonna do a thing, then do it, don't just have it written down in a character profile we don't see till after the story is over. And if not, then it's probably some kind of sentiment that doesn't translate well from Japanese to English.