A pupil or trainee.
If you are being formal, you can call them, Mr., Mrs., Ms. Miss, etc. Individuals who are pursuing a PhD do not have a title. After they have received their degree, you can then call him/her doctor.
i don't know probs they call em olympian.
A lifelong learner or autodidact.
A person who wags school is often referred to as a truant.
A person who learns a lot is often referred to as a scholar, a knowledgeable individual, or simply well-learned.
The person being defended is referred to as the defendant.
From 1670 to 1672, Newton lectured on optics.
The past participle of the verb "lecture" is "lectured."
The person being evaluated is commonly referred to as the "evaluatee" or the "subject."
AUDITEE
complainee
the accused
complainee
victim
A recluse.
A very fortunate person!!!!
Such a person is a dietician, being an expert on diet and nutrition.