On the Eye of Graeae.
Graeae (Γραῖαι, 'old women'/'grey women') were three sisters from Ancient Greek mythology, daughters of the primordial sea gods Phorcys and Ceto. They shared one eye, which they took turns using.
Pop culture adaptations sometimes blend them with Moirai, goddesses of fate. Normally they are separate entities though.
Ceto's name was also derived from cetus, generic Ancient Greek name for sea monsters (most of them were actually mothered by her). In Chinese Childe's constellation also shares the name with a real life constellation, which is called Cetus in English.
Do with it what you want.
upd: also apparently in CN it's just 灰眸, grey eyes. so the parallel could be completely invented by the EN translators.
but then, well. 'grey women'. *shrugs*














