Normally it is an administrator or manager.
One word is reprobate.
An invalid
The word is optimist.(A person who is negative is a pessimist.)
what word can I substitute for constitutes
The word is busybody.
The word could be "nitpicker."
masochist
An eavesdropper.
Commendation
extradition
The person would be inquisitive or curious.
It could be an eminent or renowned person, or a dignitary.