Speaking for myself, i do dislike adult Kinu but don't care for kid Kinu much more either. She's one of the fattest examples of Tobs' sacrificing likeability for pseudo-intellectualism and also his inability to treat complex topics in a nuanced way.
Like, why have the cute five year old talk and behave like some teacher with midlife crisis, and why have Kiyoko be all jealous of her kid and treat her like shit if the barbarian with different cultural values can't even outright call her out on it (in other words, use the barbarian angle for more than just jerk off the foxes over their assumed superiority) and if it leads to no character arc what-so-over (other than Kinu turning into hime and now idolizing her toxic mother but looking down on her father for trying to lend a hand whenever he could, because ta-da he was actually looking to curb the five-year-old independency
).
And now that i think about it, it's actually hysterical how the same behaviours that brought Garth to be loved by his daughter (although in an incestual way, because Tobs) bring the PC to be looked down by his. I guess the message is that Garth is actually an awful person and that Kinu was smarter and saw the groomer for what he was, i don't know.