Koyuki Shirogane (From Toxic Classmate to Girlfriend Goals / Yatara to Sasshi no Ii Ore wa, Dokuzetsu Kuudere Bishoujo no Chiisana Dere mo Minogasazu ni Guigui Iku)

I've been unable to find any existing models for this particular character, so i'm trying to get a good one published. (I never posted a bounty before so let me know whether the reward matches the effort)

Pony or Illustrous are both good options