Christy Ryan (クリスティー・ライアン) was one of the V.S.S.E. agents tasked with the agency's international affairs and (to a certain extent) intelligence auditing. She was killed 3 months prior to the events of Time Crisis 5.
Christy was a super-intellectual who graduated from both high school and Harvard University at an age earlier than anticipated (at age 17). Being one of the few female agents of the V.S.S.E., Ryan has a lot to prove. Posing as Diaz's administrative assistant, Ryan attempted leak information to the V.S.S.E. but was captured by Kinisky and the NDI security unit when Ryan's true intent was discovered.
Keith Martin and Robert Baxter eventually rescued Ryan, uncovered the truth about the Starline Network, which was actually a network of military satellites intended to destroy the world. Fearing the dangers of her job, Christy was possibly trained to ensure the same thing didn't happen again.
In Time Crisis 5, the auditor's briefcase was never found which revealed the auditor was murdered three months prior to the game. When Luke O'Neil and Marc Godart fought Keith Martin, the wounded agent revealed that he worked with and for Christy, whom he also was coincidentally in love with.
To save his life, Keith made Luke and Marc look at Christy's laptop (in which it was presumed Christy wanted to present the identity of the traitor to Luke and Marc), in which Luke and Marc were aghast to know that Keith was telling the truth all along. Keith deflected the knives Robert threw to kill Luke and Marc, in which Robert's cover was blown.
Taking account that Robert proved his true colors as the traitor to the V.S.S.E., it was clear that Robert killed Christy to keep his cover intact and to put the blame at Keith, in which Keith worked with and for Christy all along to tell the truth to the rookies.
|“||There's some news... He's (Wild Dog) still alive...||„|
|~ Christy Ryan, warning the V.S.S.E. agents that Wild Dog, presumed to be killed in Time Crisis, is alive and assisting Ernesto Diaz|
|“||Your (Ernesto Diaz) project is goin' down in flames! They'll be here soon!||„|
|~ Christy Ryan, commenting that Ernesto Diaz's plan for world domination will fail and that the V.S.S.E. agents will arrive|