I personally don’t headcanon Sheik in smash as any Zelda. I think they’re a shy, lonely nonbinary teen from the Hyrule of Breath Of The Wild who was greatly inspired by Link and took on the mantle of Sheik after researching the events of Ocarina Of Time. They identified a lot with how Zelda chose to disguise herself, why she did it, and the actions she took under the disguise.
Sheik changed their name and after kinda following him for a few days because they had nothing else to do and wanted to basically study him, somehow basically followed Link to smash without him or anyone else noticing.
The Hands immediately picked up on this stranger and watched as no one noticed them, they were incredibly impressed Sheik had even gotten here, much less evaded detection from the heroes and villains. So they basically summoned them to FD and asked if they wanted the official spot on the roster. Sheik immediately said yes.
The Hands also told them basically how people rolled so they wouldn’t be caught off guard and to socialize. To make sure they socialized, Crazy made sure that they teleported Sheik back into the middle of a conversation between Little Mac and Sonic.
After an awkward attempt at an explanation of their identity, Master Hand showed up and explained to everyone who they were.
Sheik became fast friends with some of the teens and, with a little time, became comfortable around the other Zelda characters, most of whom they had done extensive research on.
(submitted by thedisneydamsel98)













