>>38210607The thing about all of this, OP, is that all you really have in the top set of images are single moments that aren't able to convey more than a single facet of Kahili. Images that are incapable of moving and showing more beyond a single moment.
In comparison, the anime allows Kahili to be relaxed and not constantly putting up a game face. Why does she have to constantly be frowning or looking serious if there's no reason to do so?
There's also nothing in Kahili's characterization or dialog to denote that she's 'grumpy'. The only thing you're doing is mistaking someone's 'game face' as 'grumpiness'.