Board Thread:Naruto Gaiden/@comment-25380140-20150514070725/@comment-26275777-20150514235304

QuakingStar wrote: No, Shisui loved Itachi as a brother and the best friend he ever had. DB4 confirms they were raised together/grew up together. He was closer to Itachi than he was to Sasuke and he knew the truth behind Itachi's actions. There's a high chance he could hate Sasuke for pushing Itachi into killing himself. As Orochimaru said quite clearly, some people change and it's not always for the best.

How did *Sasuke* push Itachi into killing himself?

Honestly Shisui cannot bear any logical grudge against Sasuke without also having beef with Konoha itself, which is what puts me off this theory. Some people change, yes, but there has to be a trigger of some sort for the change especially in fiction else it breaks the suspension of disbelief. It took Rin dying in front of his eyes (and Madara's curse seal) to break Obito, who was a lot less mature and way more naive than Shisui. And even then he didn't really bear a grudge towards Kakashi - he could have killed him where he lay unconscious, he could have sought him out and killed him when he was hanging aroung Konoha - so even if you're drawing parallels to that situation it still doesn't make sense for Shisui to hate Sasuke who was merely the vessel of the system.

It could very well be Shisui, of course, but "because he killed Itachi" is horrible motivation. It completely breaks the mold of Naruto villains working for more than personal reasons. Even if it's him I suspect he has a deeper plan than killing Sasuke, if he actually intends to kill him at all. Anyone of Shisui's generation would know that Sasuke (with Naruto) took on Madara and then Kaguya; he wouldn't need to send onion boy to test his abilities. Shisui would know what an EMS Uchiha is capable of, even if he doesn't know about the Rinnegan's abilities. Whoever it is under the cloak, he doesn't seem familiar with what's up in the world at all.