Kasugano Sora is the main protagonist of the anime and video game Yasuga No Sora.
Since I haven’t watch the series of play the game I’ll just paste its wiki description here.
Sora is a quiet, fragile and reclusive girl, fraternal twin sister to the protagonist.
Yet beneath Sora’s angelic doll like appearance lies a troublesome personality that is prone to withdrawn laziness and a rather severe lack of social graces.
She seems to be very lonely when Haruka is not with her. Also she is very jealous when she sees Haru with another girl.
Why her description reminds me of Gabriel’s dropout main character…
Well anyway the designer of Sora paper craft is NMB and her paper craft requires 6 papers to build.