Random low poly textures in Photos on Nexus 4?

Twice I have had random images loaded into my pictures. They are vocaloid texture sheets, though I do not have any apps that would contain these files. It included hair, skin, and separate pupil textures and I'm wondering where this may have been from.

Edit: Some of the texture names are
Nanoha1052Custom, model and 1052C
Asked Mar 14, 2014
Edited Apr 03, 2014

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