@UserMaybe the way LHG put it is too vague. It's not really about how you might play your char. It's the mere fact that the char doesn't fit in the world. You have to consider the setting of this RP. Fresh graduates from the Hunter academy aren't usually almost in their 40's and switch weapons are also the norm in this setting. You can't just shrug off the lack of a switch-weapon because he simply is old fashioned. If he is gonna use non-switch weapons he needs to have a good reason for it.
I personally don't mind the fact that he's a little bit on the nutty side, but I'm not sure doing that just cause it's easier for you is the right way to go about it. If you want to keep it that way, be my guest.
The two other points I made about the age and weapon on the other hand. You HAVE to find a good reason why it's the case for both of those if you want the CS to be accepted.