From Halopedia, the Halo wiki
Soma was an inhabitant of Wharftown, a small settlement on the planet Seaward. She had moved to the planet out of a desire to live away from her people's high-tech society, and eschewed the use of personal body armor in favor of a naturalistic lifestyle. She enjoyed painting with a jetbrush. When the flood arrived on the planet, her jetbrush pictured the Flood making landfall.
In approximately 97,745 BCE, at age 417, Soma witnessed the landing of the first known Flood invasion since the human-Forerunner wars while painting the setting of Seaward's two suns. Her jetbrush, along with two other devices in the settlement, was used to provide information about the sighting to the Auditor and Prelate via an automated reporting system.
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