Mysterious ghost (Lennissa)

Lennissa is a former spy for Saradomin, and lived during the Second Age. She is still present in Gielinor, but only as an invisible ghost, cursed by the god Zaros for her part in Zamorak's betrayal against Zaros. Lennissa can only be seen and spoken to if the player has obtained both the ring of visibility and the ghostspeak amulet, and must be spoken to in The Curse of Zaros, to help resolve the mystery of why all the ghosts have been cursed.

Lennissa, in the Second Age, was a spy for Saradomin in the camp of Zaros' forces, most notably the Mahjarrat. She had heard that Kharrim, a messenger from the thief Rennard, who had obtained a rare and valuable god-weapon, the Staff of Armadyl. This staff had fallen into the hands of Zamorak, a Mahjarrat general under Zaros, who was planning to rebel against his lord. Lennissa sent a message to Dhalak, a magician colleague of hers, telling her to warn Saradomin of the events transpiring. However, Dhalak did not deliver the message, and when Lennissa died, she found herself cursed by Zaros to wander Gielinor forever as an invisible entity. She gives you some garments she once wore as a spy and tells you to find out what happened to Dhalak.

Lennissa can be found at the following locations:
 * The Gnomeball field, near the southern viewing platform
 * Port Sarim docks, near the Void Knight Squire
 * Entrana, by the altar in the chapel

Trivia
Lennissa speaking of Zaros:

"Evil will always breed more evil, and will never be satisfied with what it has. The Empty Lord chose to ally himself with the dark creatures of this world, fully aware that their own natures would cause them to rally against his rule, and take every opporitunity they could to betray him."

- Lennissa