Everytime someone starts talking about how useful “the ICD” is for a “mature”, “deep” and “realistic” portrayal of characters with mental disorders, I cannot help but think that what the ICD 10 Classification of Mental and Behavioural Disorders: Clinical Descriptions and Diagnostic Guidelines (not “the ICD”) would really be useful for is as a random table to determine a character’s mental disorder in the first place if they have to have one.
Main article in German.