This is Napier from Etrian Odyssey III/Nexus (or ネイピア from SQIII/X in JP).

Her base prompt:

n4pi3r, green eyes, single hair bun, earrings, blue hair, blunt bangs

Her outfit:

japanese clothes, jewelry, hair ornament, red kimono, hair flower, hair stick, wide sleeves, sash, bracelet, obi, tassel, necklace, long sleeves, beads, kanzashi, print kimono, comb,

Top it off with her holding abacus if you want.