Four Eyes is described as the "Field Scientist" class.
"Developing an unhealthy obsession with science at a young age, Christine Four Eyes Yamata specializes in virology. She is so deeply focused on her work, that she has little interest in anything else, including the feelings, or lives, of other human beings. Studious and detailed, she always wants to know more about a given situation."
Four Eye's brutal kill is her stabbing an enemy with her Hypo Gun, inducing enemy transformation into a Crimson Head ally.
Her defaultly selected weapon and primary weapon when controlled by AI will be the Light Machine Gun
When reviving a dead teammate she will say "Injuries have been patched, you're all right now".
Allows you to spawn with an Antiviral Spray and increase your carrying capacity of Antiviral Sprays to [x].
2 [750 XP]
3 [2000 XP]
4 [5000 XP]
Allows you to clearly see infected speciments in the environment [x] meters away. The weak points of infected specimens can be distinguished by their color markers. Holding (up) activates and deactivates Biometric Vision.
10 meters [750 XP]
20 meters [2000 XP]
30 meters [5000 XP]
Allows you to use a hypo gun that has a [x]% chance to infect a soldier and a [x]% chance to initiate V-ACT to turn a zombie into a Crimson Head ally. (ability button) swaps to a hypo gun. (fire button) fires an induce infection dart into the target. The ability restores after  seconds. Ammo: [x]
33%, 90%, 1 [750 XP]
50%, 95%, 2 [2000 XP]
67%, 100%, 3 [5000 XP]
(ability button) throws an Attraction Pheromone vial towards the reticle that explodes into a gas that attract T-Viurs infected enemies. Anyone covered in the gas becomes a primary target. The gas clods is [x] meters wide, lasts for [x] seconds and restores after  seconds.
12 meters, 10 seconds [1250 XP]
14 meters, 12.5 seconds [3000 XP]
16 meters, 15 seconds [6000 XP]
Use your hypo gun to control infected enemies. (ability button) swaps to a hypo gun. (fire button) fires a Program dart into an infected enemy. Press (thumb stick) to set a target for controlled enemies. PRogram infected lasts longer on weaker infected enemies and restores after  seconds. Ammo: [x]
1 [1250 XP]
3 [3000 XP]
5 [6000 XP]
FOUR EYES's abilities reflect her role as a secondary support as well as crowd control. Her passives allow her to help allies to go through tight spots, while her active skills lets her manipulate her foes in choosing targets and re-assessing their priorities.
After standing idle for a certain amount of time, FOUR EYES will utter, "This outbreak is amazing." Expressing her true interest in the given situation and her calm and collective thoughts about the chaos.