There is no end, no walls, just silence and darkness. What light had once illuminated her world has now diminished and she stands in utter chaos. The strings vibrate delicately around her as the sounds emanate from everywhere.
In her world, there are no bounds. We can not see into her world.
Slaanesh is the Chaos God of lust, excess, pleasure, perfection and hedonism
The name Slaanesh derives from Slaaneth - the god's name in the language of Chaos, (Slaa meaning "ecstasy", "pleasure", etc, Neth meaning "lord of", "master of", or "prince of"; hence, the Prince of Pleasure).