Malicion had to get herself a life. Overall, the girl was pretty lonely, to the point where she'd forgotten her name and had to make up one when coming to join the Covenant. The name fit pretty well, in her opinion. Being an Indian cobra, she was pretty scary, and venomous too. Anybody who tried to get in the reptile' sway would have her poison spat at any exposed body parts, hopefully killing or injuring them.
So, the serpent slithered in, standing up to raise her hood and show the world who she was. Malicion, snake of the Covenant.