The 'Flexer is a highly energetic, agile creature. Ninja clans prefer this variant due to its use in covert operations. These characters are rather jumpy outside of combat or circus work, and it is not uncommon to surprise a 'flexer and get smacked. They often lash out at a sudden movement, which can lead to fun or combat, however you look at it.
Don't forget about the insanity options! Click here for HQ rules.