Dr. Harlow

—His full name is Everett L. Harlow
-It's a certain Muntjac
-He usually carries a briefcase with him
-It can be around 20 or 30 years old
-He is very disciplined, serious, and strict
-He's kind of a coward
-Sometimes he speaks in a melancholic tone
-It could be an anomaly
-He wears glasses when he reads
-She knows a lot about some of the animals that come into the hospital and interact with the employees

Harlow is the current owner of the town's Animal Hospital...although, actually...he doesn't completely own the hospital...
The Animal Corporation, which owns the school, hospitals, and other establishments, controls the hospital from within. It's widely rumored that the Corporation is responsible for the appearance of the anomalies—animals with erratic, aggressive, and physically abnormal behavior—and that every patient treated at the hospital leaves infected, though no one notices. The Corporation manipulates the medicines administered at the hospital so they act on the patient's body, slowly turning them into an anomaly. A good sign of infection is the appearance of green saliva at the mouth. Of course, the Corporation will silence anyone who speaks out or reveals anything. Harlow knows the Corporation can use him as a shield whenever they want, regardless of whether he lives or dies.
Harlow doesn't care much, because according to him, he owes his life to the Corporation for saving him... Harlow was a father, he had a son and a wife, his life was prosperous and happy... until something happened... something he can't remember... but it took his son and wife from him. Apparently, the same thing happened to Harlow, but the Corporation revived him and gave him the position of doctor and owner of the hospital... His old life is a blurry memory for him... but he only knows that he can't fail the Corporation...
EXTRA INFORMATION:
—A former journalist from a production company owned by the Corporation revealed, with photos provided by your colleagues, what is happening inside the hospital; they still haven't managed to silence her...
—Harlow loves mint tea
—Harlow never takes off his face mask
Harlow has been seen receiving packages from the Corporation outside the hospital and talking to those who deliver them.