Portraits revealed through your current reading position.
The exobiologist who crossed Ilus's dead zone becomes Holden's essential expert for understanding the artifact now attached to the Tempest.
Decades earlier on Ilus, Elvi Okoye survived the colony crisis and helped shut down the alien defense network. She carried part of the protomolecule's active system into the artifact that killed its activity, experienced herself being temporarily turned off, and emerged alive. She later remained with Fayez Sarkis to study the alien world and the vanished civilization behind its machinery.
When Santiago Singh shows Holden the impossible sphere aboard the Heart of the Tempest, James Holden immediately tells him to find Elvi. Her direct passage through the Ilus artifact and years of subsequent research make her the best living witness to the mechanism that deactivated the protomolecule and may now be attacking Laconia.
An adult female scientist whose current appearance is not described; she is known as a field exobiologist equipped for dangerous work among alien ruins.
Elvi is the absent but uniquely qualified scientific authority Holden directs Laconia toward when the gate builders' killer reappears.
Also appears in books you've already read — spoiler-safe to their endings: