Sandra Tillson

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Sandra Katherine Tillson
Biographical information
Homeworld:	Coral
Born:	May 14, 2506
Died:	July 24, 2557 (aged 51)
Cause of death:	Composed by the Didact
Personal details
Species:	Human
Gender:	Female
Height:	175.3 centimeters (5 ft 9.0 in)
Weight:	59 kilograms (131 lb)
Hair color:	Gray
Political and military information
Affiliation:	United Nations Space Command
Service number:	CC-728304

Dr. Sandra "Sandy" Katherine Tillson (Civilian Consultant Number: CC-728304) was an xenoarchaeologist in the employ of the Office of Naval Intelligence. In 2557, she was studying the Composer at Ivanoff Station.

Biography

Sandra Katherine Tillson was born on May 14, 2506, on Coral. At some point in her life, Tillson studied and earned her doctorate in archaeology in the Pegasi Institute. She became one of only a handful of experts in the field of Xenoarchaeology, where she was then hired by the Office of Naval Intelligence to conduct research on a number of sites later deemed to be of Forerunner origin. When Installation 03 was initially discovered, she was one of the first people to be introduced to the research team. This led her to be the one responsible for the discovery of the Composer.

During the Raid on Ivanoff Station in July 24, 2557, she assisted in evacuating the station, while Master Chief John-117 cleared the station of Covenant attackers. Tillson volunteered to stay behind to detonate the HAVOK nukes the Chief and Cortana planned to destroy the Composer with. However, she was killed when the Didact activated the Composer, digitizing her and everyone aboard Ivanoff Station save the Master Chief.

Tillson's composed mind would be used for the artificial intelligence of TDS-009, a Promethean Knight in service to Jul 'Mdama and his Covenant. Following the Requiem Campaign, TDS-009 would take part in the Battle of Oban as part of the Third Dignitary Schema. However, during their mission of assaulting a UNSC communications bunker and eliminating the humans within, TDS-009 encounters something that fills it with feelings of revulsion, dread and fear; a small humanoid devoid of facial features and wrapped in flesh that just stands staring at the Promethean Knight. TDS-009 attempts to wait for a directive, but none come through. After the battle, as the Third Dignitary Schema are ordered to leave the human bodies to be found, TDS-009 attempts to find the strange humanoid as it wonders why it had not received a directive on it, only to find it gone.

Production notes

• Sandra Tillson was voiced by actress Adrienne Barbeau, who is best known for portraying Catwoman in Batman: The Animated Series.
• According to a Twitter post by Halo Waypoint, Tillson was born on Lodestone. Her birthplace was changed to Coral in Halo 4: The Essential Visual Guide. Halo: The Machine Breaks rectifies this inconsistency by stating Tillson was born on Coral but moved to Lodestone after the Covenant glassed her homeworld.

Gallery

• 

  Profile of Sandra Tillson.

• 

  Portrait of Doctor Sandra Tillson carrying a Data pad.

• 

  Renders of Doctor Tillson's face before, during and after being Composed.

• 

  Doctor Tillson observing the Mantle's Approach on Ivanoff Station.

• 

  Dr. Tillson undergoing the effects of the Composer.

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  TDS-009 attacks one of Jul 'Mdama's Sangheili Zealots during the Battle of Aktis IV.

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  TDS-009 trapped in a cell on Genesis.

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  Sandra Tillson remembers who she is.

List of appearances

• Halo 4 (First appearance)
• Halo: Escalation
  • Issue 15
• Halo 5: Guardians
• Halo: The Machine Breaks