Operating under the Mardock Scramble 09 emergency ordinance permitting experimental life-preservation, freelance case officer Dr. Easter leverages his background as a former military scientist. He rescued Rune Balot after her attempted murder, rebuilding her body with synthetic materials and assigning her the multidimensional AI Œufcoque as both protector and guide. This intervention preserved Balot's life while advancing his investigation into Shell Septinos and the powerful October Corporation.

Dr. Easter spearheads a broader mission to dismantle the October Corporation, a dominant entity engaged in Mardock City's illegal activities. He believes the corporation's founder would oppose its current corruption, driving his efforts through legal and investigative channels. Balot's case represents a key component of this campaign against corporate malfeasance.

His professional history includes a past partnership with both Œufcoque and Dimsdale Boiled, prior to Boiled's defection to the October Corporation. Their alliance fractured over fundamental ethical conflicts when Boiled adopted extreme methods violating operational protocols, establishing him as Dr. Easter's primary adversary.

Dr. Easter employs strategic gambles and calculated risks, exemplified by using Balot as bait to draw out Shell's assassins. This tactic assessed her capabilities while gathering evidence. He maintains a protective stance during her psychological recovery, countering her self-destructive tendencies with guidance on trust and self-worth. His connections extend to Paradise, the high-tech laboratory where Scramble 09 originated, which provided sanctuary for Balot following an assault.