Riddle #3

One bright Night Chitanda saw a shadow floating in her friend's house on window. After the sun rises her friend said she wants to try her friend's sister's new clothing and stuffs but her friend's sister don't want to, Her friend invited Chitanda to her friend's house and Chitanda noticed her friend's sister's clothings and stuffs have names. The next day Chitanda and her friend went to a festival but it was cancelled because it rained, Chitanda and her friend went to home wet.
What is the shadow Chitanda saw that night? and why?​