Updated V2 version:
Please use the updated printer profile for the V2.
Main filament should be PETG (for strength). The secondary ones can be anything, I used white and black PLA. No worries, they won't separate, all the face components (eyes, whiskers, nose) hold firmly in the main part.
There are 3 colours used in the model: base (face), secondary (nose, whiskers, pupil) and tertiary (iris). You can assign any filament for them.
Source (for remixing and custom modifications): Onshape document