His father is killed and later replaced by Fred II, who is later revealed to be Wade Collins, a war buddy of Snake Eyes and Stalker.
Kamakura appeared in the Marvel Comics stories as Sean Broca, but did not become a ninja until the "Master & Apprentice" miniseries.
Instead, his youth was explored through his ties to Snake Eyes and his Vietnam buddy Wade Collins being involved in the Fred Series.
It was revealed in this 4 issue miniseries "Master & Apprentice" that Sean joined the elite Hammer Team, a replacement for the deactivated G. I. Joe.
In response Snake Eyes leaves Scarlett on the day of their wedding and seeks solitude in his mountain cabin.
[3] Later, Kamakura saves General Hawk's life by wounding Overkill, an enemy soldier who, earlier, personally killed three Joes.
[4] His first appearance in the comic series is when he spies on the Everglades compound of the Dreadnoks for the benefit of his sensei, the 'Silent Master', a man later revealed to be Snake Eyes.
The Joes lose several Greenshirts while many Cobra Vipers and Dreadnoks die; Kamakura personally kills at least two.
[7] Later, Kamakura is the main ninja for the Joe team for some time, as Snake Eyes is mysteriously AWOL and Storm Shadow is working for Cobra yet again.
Kamakura has several confrontations with Storm Shadow; at one point the ninja only wounds him instead of delivering a deadly blow.
Joe is brought back to active duty as a much leaner team, Kamakura is set to reserve member status.
However, after Snake Eyes is seemingly killed in a mission to save Scarlett, Kamakura is reactivated to serve with Storm Shadow, giving G.I.
Sean is reintroduced in issue #206, when Scarlett and Snake Eyes spot him on their way back to Fort Wadsworth, in full Army dress uniform and standing outside his former home.
[9] After Snake Eyes and Scarlett return from a mission in Dublin, Sean receives orders to report for inspector cadre at a new training facility in Texas.
Disappointed that he will not be joining the Joes, Sean receives a gift of a commando dagger from Snake Eyes before departing.
[11] However, during this mission, the team including Throwdown runs afoul of the Red Shadows working with Cobra on a giant robot, intended to be the Black Major's ultimate weapon.
However, the robot is not shielded against atmospheric reentry, and Sean's helmet catches fire, causing severe burns to his face.
[14] Sean's vocal chords are revealed to have been destroyed, and while he is recovering in the Pit's sick bay, Hawk offers him the opportunity to assume the Snake Eyes identity, in order to have Cobra continue believing the original is still alive.
Sean Collins is declared dead and buried in Arlington National Cemetery with full honors, although the Joes are not present at the sham funeral.
[15] Sean, as Snake Eyes, succeeds in fighting off the Night Creepers with Scarlett's help, and uses the lone surviving Night Creeper to infiltrate Cobra's Silent Castle in Trans-Carpathia to send Cobra Commander a message that Snake Eyes could get to him at any time.
[17] From there, he is sent to infiltrate Storm Shadow's secret water tower lair in Manhattan, where he is reunited with the former Cobra ninja, who previously trained him.
Joe: Ninja Battles, Jinx and Kamakura assists Snake Eyes, Duke, and new apprentice Tiger Claw, in a battle against Storm Shadow and Cobra ninjas Slice, Slash, and Shadow Strike, at the forge of Arashikage Clan swordsmith Iron Master.