Also it is not immediately clear that you should talk to her to receive the item.
Regarding this part, after the player agrees to become a part of one of the departments of Investigation, if they return to the crossroads that lead to the departments, they will find Usha there. Then, they must
manually speak to her to receive the relevant belt, unlike the time when the player leaves Investigation after completing sufficient jobs where she will 'flag down the player', automatically walking up to them when they are in her sights, and initiating the conversation.
I think she should also flag down the player after they approach her after they have agreed to join one of the departments. Or... perhaps one of the seniors could inform the player to look for Usha in Investigation, because she has something for them.
Of course, for players who already know how and where to receive the belts, no problem. But for new players, it can be a problem, as it is not immediately clear.