When we first heard of shisui he was just a name told in passing. It soon became clear that itatchi had him killed, presumably to awaken his M sharingan. Even once we learned itatchi wasn’t as evil as we had been lead to believe this seemed to be the only way it happened. Then things got more confusing. Somehow danzo had gotten his hands on shisuis eye and madara really wanted it back. this was about when I heard the tobi is shisui theory. (this is not a tobi is shisui thread) NOW we know that itatchi didn’t kill shisui but that he gave his eye willingly and left. Not only that but his eye tec was MUCH stronger than we thought. So where did he go? Why exactly did he go? How did danzo get that eye if he wasn’t dead? It seems clear that shisui, once a dead character mentioned in passing is much more important than we first thought. So what do you think? Is shisui still important? Is he even dead? Regardless I will be taking tobi is shisui theories more seriously in the future.