Off-topic, re: “kokoro”
Article refers to: https://huggingface.co/hexgrad/Kokoro-82M
Caught my eye for the related name to my book of Kakuro puzzles for sale at https://www.kakurokokoro.com
Kokoro comes from the Japanese word meaning something like heart or spirit, and not the literal ones.
Also from this: https://terminator.fandom.com/wiki/Kokoro
It seems all three are equally obscure. Mine at least is a heart shape :)