Opaque, but depends
I am a big fan of waterproof liquid eyeliners and I compare them quite a lot to Korean and Japanese ones since they are the best. On my hand you can see the color is amazing, but on the eyes, with or without eye shadow, it runs a bit dry. It lasts a long time, especially since I like to wear heavy makeup from 8 am to 10 pm some days, and this eyeliner proves to last. It has two sides, of which the thicker side has more pigment, whereas it is easier to draw with the thinner one. I recommend drawing out the shape of the wing and filling it in with the thicker end.