He had killed 2+ people in side anime arc Rasengan to the chest. One with the 6-tails arc he kills the calligraphy ninja and kills a flying umbrella Rain ninja in the "forest" where people get lost and can't find a way out (kills him bu jumping on clones in order to get to him while he is flying away).
There can be more but cant remember and in no way there were any corpse display in order to keep the "pure" "hero" image he is portrayed in, tho he is supposed to be a killer for hire he acts more like a cavemen samurai.
60% = converted enemies , 38% = after a failed conversion commit suicide,
1% = unknown, 1% = ups factor
Ninja description = Kill now, don't ask questions, never turn your back to the enemy, stab your enemy if he starts to tell you his sad life story, kick them while they are down (dead man tell no tales), etc.