Neil Gaiman's "Ineffable Husbands" say mind matters on Heaven, Hell, and Earth!
Aziraphale and Crowley show symptoms of displacement disorder from being uprooted from Heaven and Hell.
Crowley displays mental health symptoms consistent with "refugee status". The quirky demon displays ADHD and traumatic withdrawal, due to years of neglect after his fall.
Aziraphale and Crowley do their best to adjust on Earth, mellowing down their powers to embrace human food and bonds.
Season 2 shows Crowley lonelier than Aziraphale, as he has fellowship with neither Hell nor Earth. He develops an unhealthy codependency for his only friend, latching onto him like a lifeline in a stormy sea.
In the series, Crowley shows signs of separation anxiety when it comes to Aziraphale.
The angel, on his part, displays symptoms of chronic anxiety and perfectionism in his dealings with Heaven. He is seen to be "obsessively" fussy in his earthly coping strategies—be it music or food.
Remember, Crowley's Holy Water suicide ideation and century-long depression nap? His bipolar disorder is shown in his manic actions, angry outbursts, and eternal grumpiness.
The central Aziraphale-Crowley friendship is forged on institutional disillusionment and job burnout. They rebel as doubts emerge about Heaven's and Hell's concepts of fairness, logic, and duty.
The series sees Gabriel as amnesic. It reduces the archangel into a dispossessed tramp with no identity.
The central duo takes care of him together—mirroring the likes of two united caregivers in a dementia facility.
In the devastating climatic scene, Aziraphale-Crowley are the poster children of internalized homophobia. They are bosom pals in their rejection of true feelings for the fear of judgment.