Trillian

Trillian Astra (real name Patricia "Tricia" McMillan) is one of the two tritagonists (alongisde Zaphod Beeblebrox) of the late Douglas Adams' novel/radio series The Hitchhiker's Guide to the Galaxy. She is a woman who travels the universe with her alien lover, Zaphod Beeblebrox, in the spaceship Heart of Gold, accompanied by her friends Arthur Dent and Ford Prefect and the ship's robot, Marvin the Paranoid Android.
In the radio series, she was voiced by the late Susan Sheridan. In the 1981 BBC television series, she was portrayed by Sandra Dickinson. In the 2005 film adaptation, she was portrayed by Zooey Deschanel, who also portrayed Jess Day in New Girl.
==Early Life==
Trillian is, in Arthur Dent's words, "Beautiful, charming, [and] devastatingly intelligent." She holds advanced degrees in math and astrophysics, but cannot find meaningful employment with them. A few months before the events of the novel, she meets Arthur at a costume party in Islington, and the two are immediately attracted to each other. When she impulsively asks him to leave with her and go traveling, however, he loses his nerve. Zaphod Beeblebrox, an alien pirate and part-time galactic president who had simply wandered onto Earth, charms her away from Arthur by saying, "Hey, is this jerk bothering you? Come with me - I've got a spaceship." Realizing she had nothing better to do, she joined Zaphod on the Heart of Gold, traveling the universe with him as his lover and first mate. Zaphod also renames her "Trillian".
==In the series==
===The Hitchhiker's Guide to the Galaxy===
Six months later, the Heart of Gold inadvertently picks up Arthur and his friend Ford Prefect, who had just been ejected from a Vogon spaceship. Trillian and Arthur are pleased to each other again and begin to rekindle the chemistry they felt at the party, although Arthur cannot bring himself to tell her that the Vogons have destroyed the Earth to make way for a hyperspace bypass.
They land on the planet Magrathea, which is legendary for creating luxury designer planets but has been apparently uninhabited for five million years. Trillian, Zaphod, and Ford leave Arthur and Marvin on the surface to explore the planet's interior, where they are take prisoner by the planet's rulers, who have taken on the forms of Trillian's pet mice. 
After interrogating them, the mice invite them to a lavish banquet, where they are met by Arthur, who has been taken in by Magrathea's chief planet architect, Slartibartfast. The mice then announce that they plan to extract Arthur's brain to find out the question of Life, the Universe, and Everything; Trillian helps Arthur and the others foil the mice's plan and escape. 
===The Restaurant at the End of the Universe===
After entering a time warp that transports them billions of years into the future, Trillian and the others go to the titular restaurant, where patrons can watch the universe end as they eat. During dinner, they get a call from Marvin, who has been at the restaurant's parking garage for eons and has found a spaceship capable of saving them from the impending apocalypse. 
The ship, which belongs to rock star Hotblack Desiato, is programmed to fly into the sun to create the pyrotechnics for his band Disaster Area's next concert. With Marvin's reluctant help, however, they teleport off the ship before it is destroyed, and Trillian and Zaphod find themselves back on the Heart of Gold, now captained by Zaphod's nemesis, Zarniwoop. 
Zarniwoop forces Trillian and Zaphod to take him to the Ruler of the Universe, who turns out to be a weak, senile old man who lives on an uninhabited planet. When Zarniwoop demands an explanation, Trillian and Zaphod instead strand him on the planet and take back the Heart of Gold.
==External Links==
*Trillian at Wikipedia
*Trillian at the Hitchhikers Wiki
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