While there were originally twelve Null-class ARCs slated to be produced in the cloning facilities of Kamino, only six made it to the final stages, at least that is what was stated on official Republic record. N-13 or Kyr'am as named by his adoptive father, Kal Skirata, was lucky to be born at all and even luckier to not have washed out were it not for Kal. Like his brothers, Kyr'am is an exceptional warrior who is proud of Mandalorian heritage and is fiercely protective of his Clone brothers as well. However, his loner nature that he inherited from Jango has led him to be unsuitable for a command role beyond Lieutenant.
Combat Victory: Kyr'am means Death in Mando'a and so N-13 brings it to all those that challenge the might of the Republic on any battlefield, in any arena.
Comrades (Clones)/Rival (Jedi): As a Null-class ARC, Kyr'am sees other clones as his younger brothers that he must fiercely protect and do whatever it takes to keep them alive and fighting. On the other hand, he sees the Jedi as incompetent commanders and weak soldiers and so intends to prove himself as more than a match for the Jedi as both leader and warrior.
As a Null-class Clone, Kyr'am has a slightly heaver build than other Clones. Even moreso his inherited tics and idiosyncrasies are well recognized by other clones