Though Aikawa seems to play 3 different roles in the movies, Takeuchi only seems to play variations on the same character (but, don't think this is a bad thing).
Mizuki Otamoko (Aikawa), a sniper assassin, is about to pull the trigger on his latest kill when he's interrupted by his target being shot in the back of the head at point blank range by one of his own men, Shuichi Sawada (Takeuchi).
But, if you were to bottle ShoAikawa's sweat and sell it as a cologne the only name fitting for it would be "Charisma".