Sandayu Momochi

Outwardly a dedicated teacher from the Land of Wa but secretly a master-level ninja from the infamous Iga clan who shared his experience and wisdom with many young pupils before arriving in Tokyo. Specializes in what's typically known as shadow cloning, except rather than creating an afterimage of himself through dextrous movement, he physically subdivides himself, actively maintaining control over his torso and limbs even when they're separated from one another. This makes slash attacks ineffective against him and also makes it virtually impossible to hold him captive. He is able to do this because he's not actually human, but rather a type of supernatural being known as Rokurokubi, Hitoban, or Dullahan, depending on the country. As a teacher, he has worked at a number of schools, filling vacancies as needed and always freely and openly sharing his knowledge with the student body, though his competitive nature makes him more interested in teaching younger students who have the determination to outperform him. He also shows great sympathy for anyone who lost a mentor, due to his own past experience.Sandayu Momochi has numerous personae and numerous bodies, and never allows anyone to know which one is the real him. This was true even back in his home world, giving him an enduring legacy of mystery. In actuality, he isn't a single being at all, but rather an aggregate of memories that include those of the three most legendary ninja masters the Iga clan has ever known. These memories provide him with the experience he now draws upon as an accomplished shadow warrior, and are responsible for his specialization in espionage and social division. In truth, those few who did once know him now tend to think he's dead, as he's manipulated every record to indicate as such. His stalwart heart is forever scarred, however, by the final parting of a student he once saw great promise in. His one true weakness is his ticklishness.