Machina’s return during the Echo Anomaly Series appears connected to Ctrl. With more Agents reclaiming ex Machina Portals, NIA researchers have reason to believe Machina will grow more aggressive following sudden bursts in Agent activity, in particular following anomalous events. Akira Tsukasa lies at the heart of this Anomaly Series, which culminates with the Ctrl XM Anomaly in Kobe, JP.
— Kilde