Select the same Brush Tool to insert the shadows and white stripes on the girl's boots. The Gradient Tool will be helpful in darkening out a little the boots sole.



Add the shadow on the girl's scarf too (Brush Tool):



Put several gleams on the scarf, selecting the long extension of the Gradient Tool on the grouped layer also.



Take the Pen Tool and Fill Path command to represent a clearer flare on the hair:



Start working with the sweater, choosing the Brush Tool and the Gradient Tool.