This is the best #crochet I've ever seen https://liisahietanen.squarespace.com/#/vapaa-free/
@glorfindel 大きな編みぐるみ~!
apparently her technique is a combination of crocheting, knitting, and embroidery.
My guess is that everything with a detailed shape that needs to be sturdy is crochet, and that the clothing some of the characters wear is knit