-Tyranny-
Umbrella figured they didn't have enough bioweapons. So they made a new one. A Symbiote, living darkness. Probably the most powerful thing they have ever created and extremely dangerous. However, they can't exactly have their most powerful weapon have significant weaknesses that people can exploit. So they expose the symbiote to everything possible. They found two distinct weaknesses, high temperature fire and high frequency sound. They exposed the Symbiote to so much of this that eventually it stopped affecting it all together. Now all they need is a test subject.
That's where Lara comes in. Normal, 23 year old woman who is currently investigating Umbrella. They kidnap her and expose her to the symbiote. Two birds, one stone. However, they cannot account for what happens next. They expect the symbiote to absorb her, take her body, kill her, anything. They do not expect the symbiote to merge with her. Healing all wounds given to her when kidnapped and making her an unkillable, super solider. Lara completely decimates the facility, destroying all research related to the symbiote. Call her selfish but she doesn't want someone else to have this kind of power. It belongs to her.