
If the Diamonds all were formed at the same time, why is Pink casted as the child of the 4?
In the art book it shows all of their gems emerging around 20,000 years ago roughly, so why is Pink treated as a child and acted as if she was significantly younger and not ready for the responsibilities of a diamond? Even if she was the last to form of the 4, she would still be over 10 thousand years old (pre gem war and colony) and was shown to possess immense power like the other Diamonds. Despite this, she was shunned from the privileges of the others and more kept around as a mascot than anything of true substantial authority.
Whats more is that Gems believed they are incapable of change and are born (well, emerged) perfect and already matured, especially in era 2 with the absence of a child stage so even if she was the last to form she should been viewed with the same maturity as the other Diamonds.