What's the name of the heroine in Resident Evil 4?

The heroine of Resident Evil 3 is the policewoman Jill in the movie Resident Evil Apocalypse.

The person you are asking is Ida. She starred in Resident Evil 2 and had a story with Lyon, so when she first met Lyon in Resident Evil 4, she said "long time no see", which means long time no see.

Ada Wong

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Six years ago, Leon met this beautiful young woman in the chaos of T virus outbreak in Dongguan bear market. She worked for an unknown organization. At that time, she was assigned to an underground laboratory in raccoon city to get samples of "G virus" from william birkins, a scientist of Umbrella Company. Leon didn't believe her, but he always tried to protect her, but he failed in the end. Ada's memory has been buried in Leon's memory. Leon doesn't know. There are many things he doesn't know.