|Homeland||Far East Usea|
|Professional Character Data|
|Callsign(s)||Edge, Scarface 2|
|Notable facts||She is a fan of Tekken 3 and Ridge Racer|
|Chronological and Political Information|
|Affiliation||Special Tactical Fighter Squadron "Scarface"|
|Kei Nagase (Ace Combat 2)|
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Kei Nagase, TAC name "Edge", is one of Scarface One's two selectable wingmen in Ace Combat 2, alongside John Harvard. She bears an uncanny resemblance to the Kei Nagase from Ace Combat 5, sharing both her name and her callsign, however, it is unlikely that they are the same person, since AC5's Nagase is a rookie pilot, whereas AC2's one is an experienced ace (and AC2 takes place twelve years before AC5). Also, this Nagase has a much higher voice than the one in Ace Combat 5.
- A character named Reiko Nagase, with a notable resemblance to Kei, plays a role in the Ridge Racer series. In Ace Combat 2's details (where she is available to be chosen as your wingman), it is stated she is Reiko's sister.
- In a cutsene in Ace Combat 3, one of the pilot who defected to Ouroboros was named Kei Nagase. However, little suggests it was the same Kei Nagase from Ace Combat 2 or Ace Combat 5.
- In Kei Nagase's Biography File in Ace Combat: Assault Horizon Legacy it states that she wants to be a civilian airliner pilot hinting towards that this Kei Nagase is in fact the same Kei Nagase from Ace Combat 04.