From the official FFVII 10th Anniversary Ultimania (2007).
"Weiss, the brother whom Nero blindly loves. White Weiss and Black Nero exist as two sides of one and the same body. They are inseparable."
From new Final Fantasy VII Remake: Material Ultimania Plus (2024)
"Nero worships/strongly adore his brother Weiss and is highly dependent of him"
Unfortunately, there is no photo. And that's all that was in the new Ultimania. Weiss didn't have a bio.
Note 1. worships - "suhai shi" can be translated both as worship and as great love and adoration, strong admiration.
Note 2. Being highly dependent in a relationship means relying too much on another person for support, decision-making, and validation. This can often come at the cost of one's own self-esteem and autonomy.
Some signs of being highly dependent in a relationship include:
Always deferring to the other person
Feeling that your emotions depend entirely on what happens with the other person
Lacking self-control, impulsiveness, suspiciousness
Feeling discomfort when you are not near the person you are dependent on
Having an insatiable need to be with that person
Looking for trust in the other person
Emotional dependence and fear of abandonment are often very closely linked.
Have an idealized view of their partner or the relationship
Believe their life lacks meaning without their partner
Jealousy Most romantic partners depend on each other to some extent.
Emotional dependency is when someone believes they need another person to be happy or to feel complete. Those who depend on their emotions on other people, especially their romantic partner, need constant attention, approval, and support because they are unable to give it to themselves. Dependent people have an extreme fear of being not good enough, which comes from their deep-rooted childhood traumas and disappointments.