Kain Fuery/History

Manga
Kain Fuery's role is a bit more significant in the manga's storyline, beginning in volume 9 with the Barry the Chopper mission to lure out the Homunculi.

After Barry catches the attention of the enemy by absconding with 2nd Lt. Maria Ross, Fuery is assigned (under the codename "Kate" ) to covertly survey Falman's safe house from his nearby secret second apartment and relay information between "Elizabeth" (Riza Hawkeye) and "Jacqueline" (Jean Havoc), who are both positioned to strike should Fuery notice the presence of suspicious activity. When Gluttony attacks Hawkeye in her sniper tower, Fuery rushes to her aid with Black Hayate, providing cover fire and extra armaments for the Lieutenant to use, though Mustang appears to rescue them when guns prove useless against the Homunculus.

In Chapter 52, when Führer King Bradley forcibly disbands Mustang's unit, Master Sergeant Fuery is the first in the team to receive his reassignment papers from Central Command and relays the information about Breda and Falman's sudden reassignment to Lt. Hawkeye just before her own orders arrive. Fuery is sent to the Southern Area Headquarters, where (as revealed in Chapter 78) he is forced to dodge shellfire laying communication cable in the front line trenches of the current border war with Aerugo in the town of Fotset. Though surrounded by death, Fuery steels his resolve and survives long enough to desert the military and rendezvous covertly with Mustang, Hawkeye and Breda in Central City in Chapter 85.

Fuery participates in Mustang's coup d'etat battle in Central City, performing admirably in the field, and his communications expertise is instrumental when Mustang's unit takes over the Capital Radio station in a bid to control the flow of information to the public.

Fuery also becomes one of the victims of the nationwide transmutation circle that took everyone's souls.