Why do Capricorn people change from angels to demons?

Capricorn, also known as Capricorn, is similar in shape to the fishtails of goat's upper and lower bodies. In layman's terms, it is like a mermaid with horns.

Because of this, it looks more in line with the image of the devil in the general story. It's possible.

There is also the fact that Capricorn is mostly a man's personality, and it is very serious at work, but it will also erupt in silence, so it seems that it has changed so much at once, and it is inevitable that it will be mistaken for the devil's side in my heart.

Ps: I'm also a Capricorn.