As you can see, Mira left her scabbard behind, for the sake of freer movement. It has absolutely nothing to do with me forgetting to draw it, and then not bothering to correct this mistake...
Also, it seems that the Maerc Technology Corporation is, among many other things, also producing vacuum cleaner robots. These have the same chassis as the lawnmower robots seen earlier, which might therefore be produced by Maerc too.
(Maerc may not be entirely upfront regarding what other functions exactly their products have besides vacuum cleaning/lawn moving though...)
If you think about it, what Mira is doing here is rather foolish:
A few years of sport fencing does not automatically turn you into an experienced warrior...
A few years of sport fencing does not automatically turn you into an experienced warrior...