I'm just thankful it's not yet another failed garbage tsundere... it's so rare people do a tsundere that isn't genuinely outright insufferable lol and it seems to constantly be a sister character that ends up being the tsundere that just constantly argues and fights with the MC. Over used trope + poorly used trope combo makes it so bad. Now I do have to say, I can enjoy a brat and a well done tsundere that isn't souly there to just be annoying. But gods am I thankful Ash is a damn good sister type instead of a garbage tsundere.