Mikage.

Mikage is the dean of the medical faculty, specializing in psychiatry. He teaches Trafalgar Law and Marco Phoenix. He hated Law since his first year, but loves Marco almost like his own son, because the latter managed to curry favor with him, so he forgives him everything.
Mikage abandoned Tomoe twenty years ago to pursue a career in psychiatry.

Mikage is the dean of the medical faculty and Otohiko's husband. He hates Trafalgar Law very much and almost expelled him, giving him a difficult internship to help Tomoe, who suffers from several mental disorders: bipolar personality disorder, impulsive personality disorder, and post-traumatic personality disorder. Mikage understands that Tomoe is a kitsune demon, so the yokai psyche is difficult to treat. He erases his memory and helps him study medicine, achieving the result that Tomoe, albeit temporarily, will live his long, unfulfilled life, each time prescribing him strong antidepressants.
At one point, he realizes that Tomoe will not be able to fully recover and then gives him a choice between becoming a human and then the likelihood of recovery will improve, or being an ekai on whom experiments will be conducted.