Onni turns rejected collaboration into assassination, killing Singh's aide before Laconian safety rounds cut him and six accomplices apart.
After Santiago Singh rejects his attempted ingratiation, Onni uses an encrypted network hidden in Medina's power conduits to organize six former station-security associates. Criminal connections and purged or falsified caches help the conspirators evade the official surveillance systems he once managed. Their objective is not restoration of the station but the symbolic death of its Laconian governor.
Onni approaches Singh in the habitat drum with his armed group and opens fire. Singh's Marine detail responds with sustained high-velocity plastic rounds, cutting all seven attackers apart without suffering casualties. A rebel bullet misses the governor and kills Lieutenant Kasik. Onni dies in the attack, leaving no possibility of interrogation, but the air-gapped system he exploited proves that Medina contains hidden networks beyond Laconian control.
A lanky Belter man with greasy hair, a permanent sneer, and resentful cunning eyes, wearing an oversized coat over station clothes during his final armed approach; his canonical image remains his living appearance.
Onni is the failed collaborator turned dead insurgent, responsible for the occupation's first successful killing and its governor's punitive reaction.