It is permissible because it comes under the heading of general adornment which includes rings, earrings, etc. it is proven that the women during the time of the Prophet ? adorned themselves with these.
Also know, is a septum piercing cultural appropriation?
It definitely was cultural appropriation at one point, but now that it has permeated cultures that did not invent it, it is perfectly reasonable for you to get the piercing as you are not appropriating the initial culture.
Beside this, are septum piercings attractive?
Extremely ,Big piercings in septum, ears , nose are made just to attract others attention. It doesn’t matter, in the best way possible. If you want the piercing, do it. Any person that doesn’t stick around because of your self expression isn’t worth not expressing yourself for.