Whack-a-mole is the grim nickname ghoul investigators give to their purges of the ghouls dwelling in Tokyo's 24th ward. Framed as both cleanup and trial by fire, it throws promising recruits against the ward's most lethal residents, and many who take part never return.
Among the CCG, Whack-a-mole is the label attached to the campaign of clearing out the ghouls that inhabit the 24th ward. The term comes into play during an underground expedition, when the agency assembles a dedicated 24 investigation team to descend into that territory. Because the ward shelters an unusual concentration of strong and hazardous ghouls, the undertaking carries a heavy toll.
Beyond simple extermination, the operation doubles as a proving ground meant to temper the CCG's most capable rising investigators against genuine danger. The gamble is steep, and the records note that a great many of those assigned to these teams do not live through the ordeal.
Kishou Arima headed the effort as its primary investigator, joined on the human side by figures such as Juuzou Suzuya, Yukinori Shinohara, Itsuki Marude, and Kureo Mado. Touko Harima and Kasuka Mado were both killed in the course of the mission. On the ghoul side, Eto is recorded as one of the few to walk away alive.

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Whack-a-mole is the CCG's nickname for its campaign to clear out the ghouls living in Tokyo's 24th ward. The operation is carried out by a dedicated 24 investigation team sent into the ward's dangerous territory.
Kishou Arima served as the primary investigator leading Whack-a-mole, working alongside human investigators including Juuzou Suzuya, Yukinori Shinohara, Itsuki Marude, and Kureo Mado.
The 24th ward shelters an unusually high concentration of strong and hazardous ghouls, which makes clearing the area a heavy toll on the CCG investigators involved, with many assigned to the operation not surviving.
Touko Harima and Kasuka Mado were both killed during the Whack-a-mole operation in the 24th ward.
Beyond clearing out ghouls, Whack-a-mole doubled as a proving ground meant to test and temper the CCG's most capable rising investigators against genuine danger.
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