How to edit virtual Artists

Sorry if this problem has been discusses elsewhere, i tried to search, but did’t come up with anything usefull.
The Situation:
I have a Soundtrack Album which contains Tracks from a Video Game. Musicbrainz has it as a Various Artists Album.
Problem: When scanning that Album into DB, Kodi (Krypton RC 3) will add “Virtual Artists”, Artists which are not within my Folder Structure. If it was just about Artwork, i would just add those missing Pictures manually, like i did with other compilations. However those Artists, beeing japanese, are getting indexed with their Hiragana Letters. Which makes it a) Hard to find, since i am not very familiar with Hiragana And b) it is actually not possible at all to find them, because there seems to be a problem showing those Hiragana chars at all (All i have is a blank entry with a picture, not sure though if this is a limitation of the Titan Skin i am using).

So i thought, I just add empty Folders for those Artists, containing a single artist.nfo where I manually replaced the name with latin letters, and a folder.jpg. No Albums or such. However, trying to scan that into my library, those Artists won’t be added (I tried even Artists I don’t have within my DB at all). I then tried to add shortcuts (Windows 7) to the corosponding Album, but no luck either.

So how (if) can one edit those virtual Artists in Kodis Music DB?