Cibo (Shi-bo) was the head scientist of the Bio-Electric Corporation located in the Capitol. She was imprisoned by their President for her failed experimentation with artificial Net Terminal Genes, which resulted in the Safeguard destroying the facility. Over time, she becomes nothing more than a decaying torso, until she is rescued by Killy and transfers into a new body. She eventually becomes Killy's most prominent partner in his quest to find net genes.
Cibo is a very perceptive being, able to sense electromagnetic frequencies and scan humans from far distances. She can also read letters, something most humans can no longer do, which allows her to access Toha Heavy Industries. After Sanakan attacks the Fishermen, she learns to speak to the Builders from Killy.
Even though Cibo apparently dies numerous times, she can transfer her consciousness into other bodies and recreate herself using back-up data. She does this after the initial Safeguard attack, where her body is destroyed in a massive explosion, and again when Killy returns her to the Corporation's facilities. Later she dies while using a Builder to battle a Safeguard, and uploads herself into Sanakan's body, though she is not strong enough to destroy her conscience. While in control of Sanakan's body, Cibo can access almost any of the Safeguard's functions, including changing her physical appearance and shape.
Killy meets an alternate-reality Cibo after getting caught in Mensab's teleportation field. This alternate version has an advanced cybernetic suit capable of flight. She helps him and the original Cibo stop Toha Heavy Industries' gravity furnace and return to their original timeline, although she is killed by a newer model Cyborg. Her body survives the teleportation, however, and when Toha's defenses critically damage the original Cibo, she finds the alternate's body and successfully transfers before Sanakan retakes control.
When the Cyborg Davine Lu Linvega steals the illegal Level 9 Safeguard data, he transfers it into Cibo's body, and it manifests before anyone can stop it. The Safeguard becomes hostile, but Killy critically damages its globe before it obliterates the entire area and retreats in a weakened state. The defenseless Cibo is attacked by Cyborgs but saved by Sanakan, who has been reprogrammed by the Governing Agency. She reveals that Cibo has become the carrier of the new Net Terminal Gene, which is a mixture of both their genes. Although they both die to an Exterminator in the following battle, Killy manages to save the globe containing their "child."