PSICOM PSICOM , short for Public Security and Intelligence Command or Public Safety and Intelligence Command , is a military force in " Final Fantasy XIII " . Commanded by Colonel Jihl Nabaat and directed by Lieutenant Colonel Yaag Rosch , they are heavily armed soldiers clad in full - armor that employ machine guns in battle . Although their appearance can vary , they are best recognized by the glowing yellow eye sockets on their helmets . In " Final Fantasy XIII " , PSICOM is referred to as " Public Security and Intelligence Command " , but in " Final Fantasy XIII - 2 " , it is called " Public Safety and Intelligence Command " . Datalog . " The Sanctum military is composed of two main branches : the Guardian Corps , responsible for maintaining security in various jurisdictions throughout Cocoon , and PSICOM - - Public Security and Intelligence Command . " " PSICOM is a military force charged with protecting Cocoon from Pulsian incursion . In contrast to the lightly armed Guardian Corps , PSICOM employs an array of advanced heavy weaponry and cruiser - class airships . " " As PSICOM bears responsibility for any and all threats of Pulse origin , it was PSICOM who conducted the Purge . " Story . " Final Fantasy XIII " . Despite being tasked with defending Cocoon from Gran Pulse invasions , the likes of which has not occurred since the War of Transgression centuries past , PSICOM is considered the superior military branch of the Sanctum . PSICOM have the most technologically advanced equipment and artillery in Cocoon at their disposal , including giant robots , airships , and transgates for summoning special genetically - modified monsters . Even with these advantages , however , the lack of actual deployment for any PSICOM divisions but the elite Eden force has left them inexperienced . After the Euride Gorge incident , a boy called Dajh Katzroy was found branded a Sanctum l ' Cie and taken into PSICOM custody under Jihl Nabaat . PSICOM was unable to determine the boy ' s Focus , but when he displayed interest in the Pulse Vestige in Bodhum , Nabaat sent a PSICOM unit to investigate . PSICOM found the Pulse fal ' Cie Anima within the Vestige , and the investigation team was branded l ' Cie and they went on to transform into Cie ' th , crystalline monsters l ' Cie who fail their Focus become . PSICOM quarantines Bodhum and the Sanctum orders the Purge of everyone in the town , making no distinction between citizens and tourists , although military personnel are exempt . While PSICOM carries out the Purge in the Hanging Edge , they move the Vestige to the restricted area where they destroy it and cast it down to Lake Bresha , which crystallizes on impact . PSICOM scours the crystallized lake searching for Purge survivors and the rogue Pulse l ' Cie who had infiltrated the Vestige while it was taken by PSICOM , but another military unit , the Cavalry , finds them first . In Palumpolum , PSICOM tracks down two of the Pulse l ' Cie , Lightning and Hope Estheim , and sets an ambush for them in the Agora , the operation being led by Yaag Rosch . The l ' Cie escape , but PSICOM corners them at the Estheim Residence , where Snow Villiers — another Pulse l ' Cie — pleads for them to see that they are neither monsters nor enemies of Cocoon . Members of the Cavalry disguised as PSICOM soldiers save the l ' Cie and take them away , foiling PSICOM ' s mission yet again . Another PSICOM unit in Nautilus , led by Nabaat , corners Sazh Katzroy and Oerba Dia Vanille , and captures them , taking them aboard the " Palamecia " to be taken to Eden for execution . The two l ' Cie escape their holding cell and reunite with the others to confront Primarch Galenth Dysley and Nabaat on the airship ' s bridge , where Dysley kills her to safely reveal his true nature as the fal ' Cie Barthandelus to the l ' Cie . During the Siege of Eden , PSICOM fights both the l ' Cie and the Pulse - based monsters set loose in the city . Yaag Rosch , now the leader of PSICOM when Nabaat has been removed , leads the operation , and hunts down the l ' Cie at Edenhall himself . He comes to realize that Cocoon has been betrayed by its fal ' Cie rulers , who in fact wish for Cocoon ' s obliteration . After deducing the Pulse l ' Cie are not enemies of Cocoon , Rosch orders PSICOM to cease all l ' Cie operations and instead focus on protecting Cocoon ' s people . Rosch sacrifices himself to help the l ' Cie reach their destination in the heart of Eden , leaving PSICOM leaderless . After Cocoon ' s fall , the surviving PSICOM soldiers collaborate with the remaining Guardian Corps troops to help the populace evacuate to Gran Pulse . " Final Fantasy XIII - 2 Fragments Before " . After Cocoon ' s fall , PSICOM was terminated along with the Sanctum . When the new provisional government revealed the truth behind the events leading to Cocoon ' s fall , the remaining soldiers were chased out of Cocoon for their role in the Purge . They leave their families , flee to the frontier lands of Gran Pulse , and form settlements distanced far from those who would retaliate . Meanwhile , their families would suffer discrimination out of association with PSICOM . PSICOM soldiers were trained only knowing to do whatever it took to protect Cocoon , even sacrifice themselves . In Palumpolum , when Snow said he and the other Pulse l ' Cie also wished to protect Cocoon , the surrounding PSICOM troops became flustered , because " protecting Cocoon " was all they knew and it was the very foundation of their lives as soldiers . After learning there was no Pulsian threat , the soldiers lost their sense of purpose . After being chased out of Cocoon , PSICOM remnants went to Gran Pulse ' s frontier lands because they ' re filled with dangerous monsters , poisonous plants , and insects ; the more danger they face , the more they feel at peace . Behind the false impression of being cruel and ruthless , PSICOM soldiers were people who had lost the meaning of their existence . Gameplay . PSICOM soldiers are faced as enemies in " Final Fantasy XIII " . Musical theme . The eponymous " PSICOM " often plays when the party face off against the military force . It is a relatively short piece largely built upon a militaristic drum march , culminating in a brass fanfare , before fading out to a short , calmer strings section to end . " PSICOM " is most notably heard during the opening FMV of Palumpolum . Other appearances . " Final Fantasy Record Keeper " . Some PSICOM troops appear as enemies in " Final Fantasy Record Keeper " .