When even waifu's gun is cute.

Fun fact: Most guns in Trails are known as "orbal guns" and use internal magic to propel bullets. Towa's is unique in that's called an "arts gun". It doesn't actually fire bullets at all, but pure magical blasts.
That's why Towa equates her weapon to a mage's staff.
The upsides are that it has effectively infinite ammo and can fire multiple types of shots (energy balls, lasers, etc), but on the other hand we see that the projectiles are much slower than the ones used by every other gun-wielding party member, and she can't fire cool trickshots like say Olivier and Crow can.
Some comparisons of the various Trails guns:

https://www.youtube.com/watch?v=f96LJ9BecPQ
https://www.youtube.com/watch?v=1C3ryyUGV-Y
https://www.youtube.com/watch?v=uFgcCSY-saY
And of course, one for the /k/ fags: https://www.youtube.com/watch?v=qRqUwlvzUU4