Heres what I see:
Olga seems like a good blend of Nicholas and Alexandra. She has the Hessian eyes and forehead but everything else seems to be Romanov.
Tatiana looks most like her father's side and she really resembles Nicholas.
Maria also looks most like her father's side. But I can see Alexandra in her eyes and forehead sometimes, which goes along with the fact that she looks just like Olga on occasions. I've also seen pictures where she looks exactly like Alexei!
Anastasia has the features of the Hessians and she and Alexandra looked a LOT alike when they were little. But her eyes aren't Hessian and they look like her fathers.
