[Once someone wears the amulet, it can't be used by others.]
An amulet was for one person. That way, no one could steal it and pretend to be a member of the Red Star Alliance.
That item was incredibly useful, it could even increase other people's combat abilities and their mutant abilities! With it, Medeia could teach most of the people in her base how to fight.
Furthermore, the amulet could be the symbol of the Red Star Alliance in the future.
[New Mission: Teach Combat Skills to More Than 10 Members of Red Star Alliance.]
[New Romance Quest: Find Out Lucian's Former Occupation Without Asking Him or His Family (Grade-A)]
[Time-Limited: 14 days]
What the hell was that quest?
How could Medeia know about his past if she didn't even ask?
Furthermore, the system only marked it as a Grade-A quest, despite the high difficulty.