Meiko is Jin's mentor. Jin is loyal to her. Instead of "Mutou", Meiko calls Jin by her first name. On the other hand, Jin calls Meiko "Onee-sama", and respects her greatly.
Jin initially underestimates Nozomi. However, after being defeated, she shows a bit respect towards her, as seen when she politely asks Nozomi not to interrupt Meiko.
Since she was demoted from the A-Rank, Jin's abilities are on a different level compared to average B-Rank players. Thus, she is hated by many Western players.