According to the law of universal gravitation, it can be theoretically proven that people are attracted to each other.

It would be difficult to prove it experimentally. Because the gravitational force between people is very small and generally cannot be detected.

Moreover, the human body also has complex effects such as electric fields and magnetic fields.

Supplementary answer to the question:

Increasing weight and reducing distance can enhance the force of gravity. However, the gravitational force is too small and cannot be detected even if it is enhanced.

The Sephiroth refers to people, but people who are closer cannot be regarded as Sephiroth.