Go to the image page. Look at the blue-green tags, where **princess celestia** and **princess luna** are; those are character tags.-- Tthere are three of them now. If you're on a desktop you can also check for character tags without even opening an image page by just hovering the pointer over a thumbnail and an alt text listing all the tags will pop up, with all the character tags near the top right after the rating and any episode or artist tags.