Ashlesha means embracing, entwining, clasping. A coil is the whole image, and a coil is ambiguous in a way most nakshatra symbols are not. The same grip that protects something also stops it leaving. Which one is happening at any moment is rarely obvious from inside it.
The coiled serpent is also the image of kundalini, the spiritual energy described as lying coiled at the base of the spine, waiting to rise. The star is strongly linked with intuition, meditation, healing and the occult. Many natives simply know things about people before being told, and learn to trust that long before they can explain it.
In Hindu mythology the Nagas are the serpent deities who guard treasure, water and hidden knowledge. They are worshipped across India, most visibly on Nag Panchami, when milk is offered at serpent images and anthills. Ashlesha is the nakshatra of the Nagas, which is why serpent remedies belong to it more than to any other star.
Its shakti (the special power a nakshatra carries) is stated in openly poisonous terms. Poison is a question of dose: the same substance that kills in one quantity treats in another, which is why pharmacology and toxicology are one subject read from two ends.
Mercury rules this star, which surprises people expecting something darker, and that pairing gives the star its real character. Ashlesha is perception first: reading a room, hearing what a pause means, knowing which word will land. The instinct people call psychic is usually attention operating faster than the person can account for.