Board Thread:Questions and Answers/@comment-27024986-20151108205144/@comment-27019038-20151109013024

No one really knows for sure, all that we know is that Kurotsuno and Sullivan were created between 2006-2011 while Kcalb was created between 2011-2012, and Mogeko didn't answer if they did have any relation with each other in a QnA.