Kagome's ancient painting (Patreon)

An ancient triptych painting has been discovered in the storage room of an old temple.
The painting is clearly old and seems to date back to the Sengoku era, so why the depicted girl wears a modern school uniform?
And why she looks like the sluttish version of Kagome?

Based on "Inuyasha" manga/anime show.

Triple version done in a "ukyo-e style" of these pictures: left, center, right.

Coloured "aged" and clean versions included.