Momonga serves as a vice admiral in the Marines, commanding pivotal operations that shape the World Government’s military agenda. He spearheaded the devastating Buster Call during the Enies Lobby crisis, deploying overwhelming force to eradicate perceived threats. After the Summit War of Marineford, he took strategic command of the G-1 base, positioning it as a frontline bastion against the Four Emperors’ dominance in the New World.

Tasked with escorting the Warlord Boa Hancock to Impel Down during the Amazon Lily arc, he confronted her cunning deceptions, including her covert aid to stowaway Monkey D. Luffy. Despite her manipulations, Momonga maintained operational integrity, supported by Lieutenant Junior Grade Stalker’s reconnaissance expertise.

His authoritative presence extends across multiple missions and media, including *One Piece Film: Strong World Episode 0*, *One Piece Movie 14: Stampede*, and *One Piece Film: Red*, where he upholds his role as a disciplined strategist. In *Episode of Merry: Mō Hitori no Nakama no Monogatari*, he reinforces his reputation through steadfast adherence to Marine protocols, consistently prioritizing duty over personal inclinations.