Land of the Lustrous - Wikipedia

Final Impressions: Land of the Lustrous (Houseki no Kuni)

Land of the Lustrous - The r/place Wiki

Land of the Lustrous Secrets (TV Episode 2017) - IMDb

The Disappearance of Haruhi Suzumiya - Wikipedia

Land of the Lustrous (TV series) - Wikipedia

Pseudomorph of Love, Houseki no Kuni Wiki

Maaya Uchida - Wikipedia

Urusei Yatsura (1981 TV series) - Wikipedia

Tokyo Ghoul (film) - Wikipedia

Jade, Houseki no Kuni Wiki

Bort, Wiki

I started to read Sakuhinshuu the other manga of ichikawa and found this. (Check the wiki for Kannon there are at least 10 differents evidences that makes it looks like it's Phos)

Land of the Lustrous (TV Series 2017) - IMDb

Amethyst, Wiki