A very nice addition to the series. Some good taunting in the story, and I also liked the neck tickling bit too - always nice to branch out from pure foot tickling (though I am a foot fan at heart, variety is the spice of life). The way you showed the pressure to win was nice too, but I felt the buildup lasted perhaps a bit too long.
Excellent tickling strategy from Kali'i, though that back-breaking technique sounds very brutal indeed. I was thinking she would be the main lee in the story (with those glittery gold toenails of hers!) but I guess you're saving that for the next battle! It'll definitely be a good fight in the next chapter! But I'm predicting it will somehow end in a tie (you know, maybe they'll both have each other's feet in a headlock and they both cry uncle at the same time right when they tickle the toes).
And then it'll be Amber versus our protagonist in a tickle showdown 😀
Looking forward to the next part!