Sword Art Online Last Recollection 3d Models textures in gray

[DiegoBotto2004]

Okay, so I had a look and it seems that the skin colour is in a little file named (model_name)_skin_mat.png. The actual colour of the meshes (clothes) are stored in the files that have the phrase "dif" as in "diffuse". I also see some normal files (labelled "no"). I don't know what the skin file does, but there is definitely some channel packing going on with the "mat" and "co" files. You might want to try UEViewer if you haven't. Here's a screenshot with diffuse and normals:
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I have UEViewer, but i can unpack the channel in the "mat" and "co" files with this tool?