Basic Tips for image search
For a very basic level, in google chrome, you can right click the image and select 'Search Google for this image' and the image will be brought in search. (provided only if the image is in the <img> tag)
Sometimes you might not able to 'Search Google for this image' or download the image by right click, such as instagram, etc. If you can't select the image that you seen by using 'Search Google for this image', then the image is written in another form without the <img> tag, which could be <div style="background:url(____);"></div>, or in other html forms.
In order to overcome this in google chrome, just right click on the image, select 'Inspect element', it will bring you straight to the html form of the particular image, you will normally see a underlined link in blue, and when you mouseover the link, it will show the small pop-up of the image with a detail of the size of the image. Click that link, and open that image in a new tab, NOW you can use the 'Search Google for this image' selection using right click.
P.S. This might not work for some cases for more advanced html codes.
If the above method didn't work, another way is to go to 'Inspect Element' by right click anywhere of the page, click on the 'Resources' on the top, and find the 'Images' section on the left sidebar. (Usually, it is under Frames --> folder(website) --> Images). Inside 'Images', you will find lots of images on the list, just click the first one, and slowly use your down arrow on the keyboard to go through the image one by one until you found the image that you are looking for, open it on the new tab and perform the 'Search Google for this image' by right click.
Another way is to make a screenshot of that image, save it on your computer file, and go to Google Images, and upload that image to google images manually and the image search will be performed.
there are many other ways.
the identification of a girl using this method sometimes might works, sometimes not might work, or even sometimes it gives you a wrong result.