Student or Learner
Jean only treats those riches and famous and holding high position in workplace, yet, not willing to make friend or even say 'hi' to the ordinary people without signifiance.
1) What shall I describe Jean's personally?
2) What shall I describe Jean's attitude towards the
a) wealthy people
b) not-wealthy people?
If you mean that she is only too ready to give her time and attention to rich and famous people, you could say she was being sycophantic, fawning, obsequious. There are several more possibilities.
If she has no interest in ordinary people she is acting snobbish, aloof, disdainful, superior. Again, there are many other terms.
not a teacher