Belyaeva Yuliya is a photographer and cosplayer who created the imagery of Pietas used all over my website. She is known on Instagram as photographer @by_cosphoto, and as cosplayer @by_yulli.
The English variant of her name is Julia.
If you are in Russia and want her to photograph your cosplay, you're in luck. That's her location also! You can find her pricing on VK (the Russian equivalent of Facebook).