Uni Posca PC-1M is a fine hard bullet tip at 0.7mm that I really like because the nib is tough and doesn't wear down as quick as the other paint markers.
Uni Posca PC-3M is another bullet tip but slightly larger at 0.9mm to 1.3mm and softer felt tip. These pens are perfect for colouring in some of the larger areas of a small piece. Check out my video here and you can see me use these pens to colour in the bigger stripes. If drawing on card be gentle because these pens will pull up the fibres from the paper and make your art look messy.
Uni Pin Fine Line 0.1 Black is a new pen to me, very delicate and its super fine 0.1mm size mean it is ideal for the last bits of detail. It's not a paint marker so use it sparingly because it will reflect the light differently to the paint markers.