Jupiter's largest moon and the primary food production centre for the outer planets, its vast mirror arrays and underground farms feeding millions across the Belt. A protomolecule hybrid attack on Ganymede's surface triggered a catastrophic battle between UN and Martian forces stationed there, collapsing the mirrors and devastating the agricultural infrastructure. The resulting food crisis pushed the outer system toward famine and brought Earth and Mars to the edge of open war. Praxidike Meng's search for his kidnapped daughter Mei, taken for Mao-Kwikowski's hybrid experiments, led the Rocinante crew to uncover the connection between the Ganymede attack and the Io research facility.