| Description | Shapeshifter |
| Size | Medium/Large |
| Skin Pigment | Black |
| Hair | None evident |
| Distinguishing Features | Resembles a large black pool |
| Series | TNG: "Skin of Evil" |
| Planet of Origin | Vagra II |
| Quadrant | Alpha (assumed) |
| Background | Armus was formed when the inhabitants of Vagra II developed a way to rid themselves of the evil within themselves. They departed the planet as pure creatures leaving Armus abandoned on the planet. After centuries of loneliness, he grew into a bitter and malevolent entity. |
| Editors Notes | Armus is a creature of extreme evil and great anger. He attacked an away team from the USS Enterprise-D eventually killing the Chief of Security, Tasha Yar. |