The child that is forget about and likes lots of privacy. The parents will let the older and
youngest child do anything but not
the middle child.
The middle child will listen to the sad songs and has to clean up the other siblings mess. Gets left out of everything. The other two siblings usually team up on the middle child. The parents will tell the middle child they will get them something and then never get them it. The parents will spoil the other kids but never the middle child. The parents will compare the middle child with the oldest child.