lucretia

Lucretia is a pale-haired girl and a member of the Irregulars. She has a Geass ability called "The Land," which creates an accurate three-dimensional map of terrain within a specific range. The data from her perceptions are immediately sent to her Knightmare Frame through a cockpit neuro-imaging device and combined with GPS information before being shared with her team for tactical use. When her Geass is active, a Geass symbol appears on her forehead. She usually works alongside Sancia, whose tracking Geass complements her own. Among the three, Lucretia is the calmest and considers her team as siblings, having lost all her relatives in the war. Source: CodeGeass Wiki