A pretty girl doesn't have typical poses, but if their have not same personality, you can draw this in the pose too. You see, the first girl sure herself, and leading personality, her pose is beam out. But the second girl is bashful, she doesn't sure herself, and constrict her body. The third girl pose is a hybrid of the first and the second poses. She is glaring and flirting, but she mystery too.
If you catch the rigth pose for your figure, you can show her personality in the first feeling.