We can litterally take any hetalia character and dub them have some sort of disorder

For ex. Britain would have schizophrenia

Germany would have ocd

Italy would have adhd

Romano would have bipolar disorder

America would have that eating disorder I can never name at the top of my head

Kumajiro would have amnesia

Prussia would have histrionic personality disorder

Hungary would most likely have bpd or something like it

Etc