THIS AVATAR USES MODS THAT I DIDN'T IMPORT OR SUBMIT! All credits go to @BeautiDuwanger!
The modder's thread can be found here: https://www.saintsrowmods.com/forum/threads/hatsune-miku.18840/
Link to the Steam Workshop download here: https://steamcommunity.com/sharedfiles/filedetails/?id=1392602204