Oracle

The Oracle is a strange woman who lives atop Ice Mountain. She is an important figure in the Dragon Slayer quest, as she provides a clue as to how to access one of the map pieces. She is also involved in Perils of Ice Mountain, where she foretells of a day when the Kharidian desert will reach Varrock and Falador if the player does not repair the environmental damage caused by the Dwarven Power Station. During that quest, the tent in which she lives is damaged in an avalanche, though it is repaired by the player. Occasionally, she will be visited by Postie Pete and, after completion of The Chosen Commander, Zanik as well. One of the Wise Old Man's tasks involves taking a message to her.

Original Purpose
According to a posting by Andrew in June 1999 (one of the first references to his RPG)

"'I'm (very slowly) writing my own Java RPG, and eventually I want to have this oracle type thing up a mountain where you can go, and it will give you a hint on your current quest. Obviously you should make it fairly hard to get to. (i.e put it out of the way, and protect it with some monsters) but it does stop people getting completely and utterly stuck!'"

Dialogue
When spoken to, she says a wide variety of one-liners. These range from bizarre advice to warnings and hints. She spoke of the Stone of Jas long before While Guthix Sleeps or even Meeting History, where the stone is first seen. She even makes references to the dragonkin and Juna, as well as comical phrases such as, "if a tree falls in a forest and nobody is there, nobody gets woodcutting xp."

Trivia
Oracle Oracle
 * Originally, the Oracle was a man, however in June of 2007, he was given a tent, a graphical makeover, and turned into a female. Therefore, the Oracle was the first NPC to switch gender (excluding the Makeover mage, who switches gender periodically).
 * One of the Oracles one-liners, "Who guards the guardsmen?", is a reference to "Quis custodiet ipsos custodes," a Latin phrase meaning "Who will guard the guards?", or alternatively "Who watches the Watchmen" from the popular graphic novel 'Watchmen'.
 * In ancient times, oracles would live on top of mountains, and were consulted by the kings and leaders of countries. They were considered close to the gods (as the oracle in RuneScape is as well).
 * One of her phrases, "When in Asgarnia, do like Asgarnians do," is a reference to the phrase "When in Rome, do as Romans do".
 * In one of her phrases, "Do not fear the dragons...fear their kin," is a reference to the Dragonkin.
 * The phrase, "The great snake of Guthix guards more than she knows," most likely refers to Juna who is a snake guarding the Tears of Guthix cave, and, unknowingly, the Stone of Jas.
 * The phrase "The god wars are over...as long as the thing they were fighting over remains hidden," may be a reference to the Stone of Jas or the Godsword.
 * The phrase "Jas has left a stone behind." is a reference to the Stone of Jas and hints to the possibility of numerous stones or similar artefacts of Jas.
 * After the Oracle's face update on October 23, 2012, the Oracle's movement animations was changed, which causes the Oracle's head to move away from her body. This has not been fixed since.