Eveline/biology

Eveline is a unique bioweapon, using a fungus produced by her body to control people's minds. The filaments that are produced lead to the origin of bacterium superorganisms known as Mold, which Eveline utilizes to infect other people by infusing it directly into their bodies. She can do so either through physical contact, by engulfing people in the Mold, or by getting her victims to consume the infection in some way, as she was able to contaminate the Baker family's food supply to get their victims infected by feeding them the infected food. Once the degree of the contamination is high enough, her mind and that of the victims' become connected through biological and chemical conditions, allowing her to influence her victim's behavior and actions and manipulate them into doing her biddings, such as causing them to become hostile or perform self-mutilation. With psychological shock breaking down her victim's natural mind barrier, she is able to brainwash her victims.

Her victims can become physically affected by her as well, gaining a variable level of inhuman strength, resilience, mobility and regenerative capabilities. Some of them even develop more unusual abilities, such as Marguerite Baker becoming more insect-like and being able to both control insects and house them inside her body. This worked well if the host's brain proved to be compatible, but otherwise, they would slowly die and their biomass would be consumed by the Mold and convert into the Molded.

In her young form, she appeared to possess telekinetic capabilities, allowing her to shut doors while running away from Mia on board the cargo ship, even though she did not physically touch them and caused a man running towards Mia to suddenly explode into blood and gore. Additionally, Eveline was able to project shockwaves capable of knocking back Ethan and Mia on separate occasions. However, this ability is only shown while she appeared as a hallucination, making it possible that she cannot truly affect the physical world in such a manner. Despite this, she could use her form as a hallucination to rapidly appear and disappear in the eyes of those she telepathically communicates with, simulating the ability to teleport.

Eveline's control over the Mold additionally allows her to create the Molded out of the human biomass of corpses or even infected people, transforming them into Molded. This also allows her to make the infection lethal to a host to degenerate or calcify their bodies at various rates, She notably was able to cause the infection inside of Alan to rapidly engulf his body and caused him to vomit bile until he died. She could direct the growth of the Mold to grow over large areas and inside structures, as well as animating the mass to ensnare and expand into giant tentacles. Some of the structures would fuse to ensnared humans for their biomass to be converted into Molded.

She also undergoes rapid aging if she does not receive a medication that slows it to a normal rate. Due to her physical deterioration and being injected with the serum that counteracted her infection, her body was consumed by it, converting all of the accumulated Mold's mass into a single physical super-organism which appears as a humongous mass of black tendrils, with her face in the center.