I don't think that advanced civilization need warriors, but they may preserve their martial arts because of their beauty, so, some young practicants can be find training their movements.
That weapon is emulating their old swords with energy wheels, but the blue energy doesn't does any damage; the original had red wheels, so this one is just a copy to remember their origins but evading any possibility of getting hurt.
Hope you like it, and of course, you are free to give him a hug, just take care of that tail...