This is a custom version of Cassandra, the idea is to keep the essence and appearance of the original character. Physically, the height and size and shape of breasts, hips and buttocks were modified to make her look more like a teenager and that the character is not so thin.
Mikasa Ackerman from Attack on Titan aka the anime that hated its audience so hard it refused to give us a decent ending by IdicheVolfe, week early access for patrons :)