It's her eye/pupils that make her look out of place. Oxalis stays is fine because of her big pupil/eye design that the majority of the girls have. I guess this is just what we have to deal with when games use multiple different artists.
Here's what I would have preferred her eyes look like.
Much more cute with bigger pupils.
She kinda reminds me of Kirino from Oreimo cosplaying as an indian girl in that picture.