Conrad Kellogg Conrad " Connie " Kellogg is a Magnum - toting , ruthless , and highly skilled mercenary who serves as the Institute ' s primary operative within the Commonwealth . He appears as the secondary antagonist in " Fallout 4 " . Background . Born in 2179 , Kellogg hails from the New California Republic on the West Coast . As a child , he lived in an impoverished household with his abusive father , a former raider , and his cynical , but loving mother . Being an alcoholic and abusive parent , Kellogg ' s father was unreliable as a provider for the family . Instead , Conrad ' s mother turned to her son for support , while also teaching him that relying on others was foolishness , and that the only things in the world he could depend on was himself and his own gun . As an adult , Kellogg moved to San Francisco , where he married Sarah and had a daughter , Mary . Though Kellogg worked for the Shi , his family was murdered by unspecified assailants - whom he later killed in retaliation . After the death of his family , Kellogg spent his life traveling eastward , working as a mercenary willing to do any job no matter how dirty . Some time later , he reached the East Coast and the Commonwealth , where he was eventually hired by the Institute to act as their primary surface operative , due to his extensive experience working in the Wasteland , something which the Institute ' s members lacked . Kellogg was eventually tasked with leading a team of Institute scientists in invading Vault 111 . The Institute required radiation - free test subjects , and the vault ' s cryogenically - preserved residents were the perfect candidates . Kellogg chose Shaun , and killed Nate / Nora when s / he resisted . Kellogg then taunted the surviving parent , remarking that at least the " backup " will be unharmed before leaving the vault ; Shaun ' s DNA was used by the Institute to complete the Generation 3 synth s . At some point , Kellogg was cybernetically enhanced by the Institute , which halted his aging and extended his lifespan . By 2287 , he is over 108 years old , but physically appears to be less than half of that . Some time after kidnapping Shaun , Kellogg lived for a while in Diamond City with a synth with the appearance of a ten year old Shaun ( according to Ellie Perkins ) . He eventually abandoned the house after X6 - 88 came to collect synthetic Shaun on behalf of the Institute . He was then tasked with tracking down the rogue Institute scientist Dr . Brian Virgil , who had recently fled from the Institute . In preparation for tracking down Dr . Virgil , Kellogg set up a base of operations in Fort Hagen , though he became injured in several battles on his way from Diamond City . With help of Dogmeat , the Sole Survivor is able to track Kellogg to his base of operations . They fight through Fort Hagen ' s synth detail , as Kellogg taunts them , offering the Survivor a chance to turn back . As the player character approaches , Kellogg takes note of their determination and allows them a chance to talk to him , by revealing himself and ordering his synths to stand down . Kellogg informs the Sole Survivor that Shaun is no longer with him , but with the Institute . The conversation inevitably leads to a fight which results in Kellogg ' s demise . The Sole Survivor is able to access Kellogg ' s memories with the use of his Cybernetic brain augmenter , and the aid of Nick Valentine and Dr . Amari . After leaving Kellogg ' s memories , the last echoes of the mercenary ' s consciousness speak to the Sole Survivor through Nick ' s body . Interactions with the player character . Effects of player ' s actions . The Sole Survivor will have to slay Kellogg and take his chip away to Memory Den , where they will use Nick Valentine to see Kellogg ' s past and find the only way to enter the Institute . Appearances . Kellogg appears only in " Fallout 4 " .