A person being judged or commented on can be referred to as a "subject" or "individual under scrutiny." In a more informal context, they might be called a "target" of criticism or evaluation. Additionally, terms like "defendant" or "accused" may apply in legal contexts.
The person being defended is referred to as the defendant.
The person being evaluated is commonly referred to as the "evaluatee" or the "subject."
AUDITEE
complainee
the accused
complainee
A person who gets defensive when asked questions may be described as defensive or sensitive. This behavior can stem from insecurity, anxiety, or a fear of being judged. Such individuals might react protectively to perceived criticism or scrutiny, making them less open to discussion or feedback.
victim
A recluse.
A very fortunate person!!!!
Such a person is a dietician, being an expert on diet and nutrition.
A person in their 50s is commonly referred to as being middle-aged.