Sumika is Ariu Mikaboshi’s insect constructs, poisoned air, and a Datenseki-hardened body. Ariu is crown prince at the Irishima talks. After chapter 119, explainers argue Magatsumi copies his insect sorcery. The chapters have not confirmed that. This encyclopedia marks that camp as a camp.
Kings who already live with the stone
The Mikaboshi were sorcerer kings the Soga drove into the sea. Their undersea habitat is Datenseki as architecture. Mainland users pop. They do not. Mashiro dies later to Ariu; Part 2 still has him alive in the talks. Official chapters: VIZ / MANGA Plus.
File: Ariu, undersea habitat, marked theories.