Board Thread:Naruto Discussions/@comment-26567684-20150918015657/@comment-26636534-20150919130118

Kabuto, orphan like Naruto, killed his family(adopted mother) and forced into missions at a young age like Itachi, had no comrades, village and identity like Obito, but unlike Obito he didn't chose it. Eventually was labeled as too dangerous and his elimination was orchestrated by Danzo by his brainwashed adoptive mother which he himself killed similar to Nagato, was controlled by Sasori then influenced by Orochimaru, similar to Sasuke (first Itachi then Obito).

Kabuto is pretty much up there with Gaara and Itachi on difficult childhoods.