Argolins are humanoids with yellowish green skin and intricate green and yellow hair. Although they begin life with a more Human-like skin tone, they develop their distinctive hair at an early age.
After the war with the Foamasi, the Argolin were rendered sterile and had their metabolism modified. On the top of their heads, they have small horns covered in nodules. Most of their lives, Argolins have stable metabolism. These nodules fall off as the Argolin ages, with the last nodule singling death. After this, the Argolin rapidly decays.