Marlene learns of Aerith's death through Reeve Tuesti, the individual responsible for the character known as Cait Sith.
The Revelation of Aerith's Fate
Marlene Wallace, a young inhabitant of the Seventh Heaven bar, becomes aware of the tragic demise of Aerith Gainsborough at the hands of Sephiroth. This pivotal information is directly communicated to her by Reeve Tuesti, who also serves as the handler for the robotic ally, Cait Sith.
While the precise moment of Marlene's release from captivity remains unspecified, her knowledge of these significant events is confirmed. Subsequently, during the evacuation of Midgar and the approach of the Meteor, Marlene is observed watching these crucial events unfold from the watchtower located in Kalm, a town situated near Midgar. This direct communication from Reeve ensures that Marlene is informed of the profound loss within the group, underscoring the widespread impact of Aerith's passing.
