Virgin

A virgin is someone who has not yet slept with another person. In King's Quest it often referred to in regards to virgin maidens.

Background
The Three-headed Dragon demanded that pure virgin maidens be sacrificed to it. Graham chose to send several maidens to be sacrificed, including his own daughter, Rosella.

Oracles by tradition are either virgins, or married women over the age of fifty.

It is said that only a pure virgin maiden may touch or ride a unicorn, and that none can ever tame it. For these reasons it is a symbol of freedom and purity

Behind the scenes
Virgin rock as mentioned in Quest for the Crown: From the Chronicles of Daventry, Part I, refers to rocks that are young, or haven't been delved (mined) or worked by human hands (natural).

The virgin is also associated with the Zodiac, Virgo representing Astraea or Astrea (Ancient Greek: Ἀστραῖα;[1] English translation: "star-maiden"), who in ancient Greek religion, was a daughter of Astraeus and Eos. She was the virgin goddess of Innocence and purity and is always associated with the Greek goddess of justice, Dike (daughter of Zeus and Themis and the personification of just judgement).