A personal favorite character of mine is Szyncletica, based on Firewall's Shiradi Shuricannon, a deadly pure Ninja Spy with the lowest base damage weapon in the game, a shuriken, training herself to become a walking howitzer.
A few requests have asked if anyone can show the power of a Shuricannon build. I created a video of my Shuricannon at level 19 in "Running with the Devils" to illustrate and discuss what the 'Cannon is and isn't. I may make a demo, later, of what the Epic S'Cannon can do with the power of the Shiradi Champion in its grasp.
(The video was a bit dark to see; you should find a slightly improved version available there shortly.)