shrine maiden
孁 centers on a shrine maiden, a woman serving at a shrine. The meaning is narrow and specific, with no clear broader conceptual cluster.
孁 combines 霝 (likely a phonetic component) with 女 (woman), suggesting a woman associated with the sound 霝. The exact historical development is uncertain.
The top 霝 looks like rain over mouths, perhaps suggesting ritual chanting. Below, 女 is a woman. Picture a shrine maiden performing rain rituals.
For レイ, imagine the shrine maiden laying out offerings: lay -> レイ, as she carefully arranges them at the shrine.