Diane

From the Metal Gear Wiki

Diane
Official artwork of Diane for Metal Gear.
Nationality	South African
Affiliations	Resistance movement at Galzburgh
Appears in	Metal Gear
Created by	Hideo Kojima

Diane (ダイアン, Daian^?) is a member of the Resistance movement at Outer Heaven. She was formerly a vocalist of Thin Wall, a positive punk band and uses her feminity for intelligence activities. Having gone on several intelligence missions in Outer Heaven, she has accumulated knowledge about the mercenaries and armaments of Outer Heaven. During Operation Intrude N313, she provided her expertise to Solid Snake, providing with the weaknesses of each of Outer Heaven's mercenaries. She apparently had romantic feelings for Snake, but never expressed her feelings to him. She lived with her brother Steve, who would often answer Snake's calls only to be annoyed with him and provided excuses for Diane's absence.

It's unknown if she or her brother survived the NATO bombings after Operation Intrude N313.