The Infinite Extent characters

First appears in chapter 2

A Bob who leads an expedition to survey the Pan-Galactic Federation's network of wormholes. He coordinates the effort to chart its gaps and look for a route that could support a response to Nemesis.

Also known as Cal

First appears in chapter 2

A returning Bob explorer who has recently reconnected with the wider Bobiverse after receiving communications plans by radio. He and Goku join the survey of routes extending beyond the known Federation network.

First appears in chapter 2

Calvin's fellow Bob explorer, newly back in contact with the Bobiverse. He works closely with Calvin and joins the wider effort to explore the Pan-Galactic Federation's network.

First appears in chapter 3

A Bob explorer whose vessel is crippled immediately after he returns to human space through WormNet. Faced with unmarked ships and a demand to surrender, he chooses self-destruction rather than risk capture.

First appears in chapter 5

A Bob who accompanies Bridget on a discreet visit to the relocated dragons of Lemuria. He helps observe the settlement while Bridget leads the biological assessment of its long-term viability.

First appears in chapter 5

A biologist and advocate for the dragons on Lemuria. She evaluates whether their new environment can sustain them, balancing plentiful food and space against uncertain breeding and the slow growth of their floating habitats.

First appears in chapter 6

A senior Bob who handles difficult organizational work for the UFS. He agrees to arrange official approval and a biological diplomatic mission after the Federation refuses to accept a digital applicant for provisional membership.

First appears in chapter 8

A Quinlan diplomat who opens formal talks with New PAV. She directs the mission while Bob, using a Quinlan body, serves as her nominal assistant so that visible human involvement does not derail the meeting.

First appears in chapter 8

A senior replicant who supports Teresa's diplomatic mission in a Quinlan body. He accepts a subordinate public role because New PAV's representatives will speak with Quinlans but do not welcome humans.

First appears in chapter 9

A Bob physicist and strategic coordinator who restores Greg from a backup after two scheduled updates are missed. He treats the missing vessel as a possible attack and authorizes an armed investigation of Greg's last route.

First appears in chapter 19

An exceptional Quinlan digital intelligence cited during the UFS application as an example of a free and adaptable mind. Anik's existence helps distinguish the UFS from the Federation's tightly limited artificial task systems.

First appears in chapter 19

A known artificial intelligence whose existence helps demonstrate why the UFS does not fit the Federation's restrictions on digital persons. The biological applicant presents Thoth as far more capable and independent than a dedicated task system.

First appears in chapter 21

A Skippy representative who helps Bill's group interpret the Federation's distinction between conscious digital people and artificial minds confined to assigned tasks. His perspective informs their assessment of the rejected application.

First appears in chapter 21

A Bob engineer who joins Bill's discussion of the failed Federation application. He suggests that wormhole links may have been cut to isolate populations that resisted Federation policy after the Great Upheaval.

First appears in chapter 24

A patient whose biological body was revived after she had spent years existing as a replicant. The simultaneous biological and digital versions make her case central to questions about identity and continuity.

First appears in chapter 26

A Bob who indicates that Earth's restored ecosystem can accept settlers, making recolonization a practical option for the population aboard Fargo.

First appears in chapter 34

Icarus's Bob expedition partner. Together they collect communications relays, compare discoveries with the larger exploration team, and investigate irregularities, missing links, and concealed infrastructure in the Federation's wormhole map.

Also known as Day

First appears in chapter 67

Icarus's Bob expedition partner, earlier known as Day. He joins Icarus in locating and entering an old wormhole route near Sagittarius A-star.

First appears in chapter 37

A later-generation Bob who identifies as female and operates in Delta Dorada. She offers a large metal reserve and two auto factories when the colonial defense effort urgently needs industrial support.

First appears in chapter 39

A Bob coordinating intelligence and liaison work across the colonial war. His analysis identifies the broad direction from which enemy reinforcements are entering contested systems and narrows the likely location of their staging areas.

First appears in chapter 43

A Brazilian probe replicant who declares himself the leader of the coordinated attacks on human colonies. He demands restoration of a Brazilian Empire, an end to replication, and the destruction of the Bobs.