Ylla K.

Ylla, a Martian with light brown skin, yellow eyes, and a melodic voice is the wife of Yll K. Unhappy in her now-dull marriage and longing for outside excitement, Ylla symbolizes the housewife of Earth in the 1940's. Ylla forms a telepathic bond with the first of the Mars explorers, Captain Nathanial York. Her dreams of him, including a kiss and an offer to escape with him, lead her husband to find the party in Green Valley, and to kill York and his crewmate, ending the first expedition from Earth to Mars.

Yll K.

An unhappy, ill-tempered, jealous Martian, Yll is married to Ylla and symbolizes the jealous American male. His preoccupation with books and his temperamental behaviors have allowed Yll and his wife to drift apart during their marriage. When his wife forms a telepathic bond with incoming explorers from Earth, and finds herself attracted to...