Trying to make Fonts Fallbacks to real Bold/Italic font data

I figured out about how Unity getting specific font style. Few experiments told me something about things that work and don't. I'll leave this to everyone who have the same problem. From beginning:

1. Every fonts have a fallback list. That's the list that labeled as "Reference to other fonts in project"

2. This fallback list is also used as a way to getting alternative bold/italic styling. Therefore, you should make sure every font family are referenced to each other. The inspector shows this can be solved by giving the same name to all font families (this is default, anyway).

3. If nothing found, they'll attempt to get it from system. Here's the proof:

4. 

5. You must pay attention for that, because it is mean they are not pick the font from project files (therefore, giving varies result on different platforms).

6. The importer is might broken. See the list again. Even it's same, but for me, it still doesn't work. Fonts still doesn't reference each other, see below.

7. 

8. You can't solve it by deleting then reimporting it again. Closing the project, delete Libraries Folder, reimpoting all project. It didn't work. The solution is type "enter" on Font Names (aka. modify Font Names box), so the importer will start to look for fallbacks in project (took me hours to figure this).

9. You must do this on all font, one by one.

10. Sometime the trick above is still don't work. Why? The importer might broken. Sometimes, it is work but didn't show up on importer, or it doesn't been updated. The only way fix this is attempt to modify font's .meta file

If you open font's .meta file, you'll see this section...

   fallbackFontReferences:
   - {fileID: 12800000, guid: fe015f6966a3b3f408fcbbcda2cd14b0, type: 3}
   - {fileID: 12800000, guid: 59146b2b5ecbcde448ff42c68fe3726f, type: 3}

These GUIDs are reference to font fallbacks, so you can check or add if there GUIDs refer to correct font file. I'm solving my problem by adding bold/italic GUIDs to regular font's .meta file.