Either one of those Ryuko's isn't Christina, or there are pictures in here from two different set timelines. Picture 5 is lacking the tattoo, and it doesn't look like Christina (though that could also be from a time before all the shooping of her photos).
@Yanoma This cobbled together set consists of photos from at least 3 different photographers (Loonymoon, Makar Vinogradov & Dmitry Gabdukaev). Her clothes changes between rubber/plastic/tape and cloth/spandex. In other words, it's entirely possibly some of the photos isn't Christina.