People with relatively peaceful personality will generally have soft and round fonts; A person with a strong personality, the font often looks very nervous; A person with a rough personality usually has scrawled fonts. . . . . . Wait a minute.
The character displayed by the font is usually the writer's inner character. For example, some people look generous and heroic, but the words they write are round and beautiful, so we see that generosity and heroism are just his appearance, but his heart is actually a sensitive and delicate person. The same is true of other personality manifestations.
As for people's good and evil, you can't see the font. For example, the traitors Cai Jing and Qin Gui are both masters of calligraphy, which only shows that he is talented, but not that he is a good man.