>>81376697those are shiny joshus!
hakui koyori has two official assistant colors, pink, and shiny (aqua? teal? fresh mint), hes called shiny joshu because he's... a lot rarer than pink ones!
over time the that color scheme became associated with ai koyori (koyori made her own neuro type thing that she streams with sometimes)
so i guess theyre ai joshu?
https://www.youtube.com/watch?v=chiz9UbuD3c