Originally Posted by Emissary of Justice
Kyoraku didn't permit him to leave. Yhwach created a portal on his side of the barrier, allowing him to return.
Rukia and Renji arriving like they're supposed to be all bad ass is just amusing to me. When has Rukia ever been powerful, much less strong enough to be a force here?
Um..so when they did all that talking before he entered said "portal"...SS could of attempted to contest his leaving...since the barrier before them she created herself..
He was summoned it didn't say anything about the actual summoning being a portal....
Just as he easily appeared in head captains headquarters...he is shown walking into the court before Juha Bach. He could of simply used the shadows for transport....