@Halvtandthat would depend, if it was something minor like seeing a building being made then it's fine but if it's something that will influence the story then you need to run it by me first
You can probably run it by me too if its a big thing, I'm pretty good at feeling story flow and all that. Also if you got arc ideas post 'em here.
Also I'd recommend that if you need to take control of the head captain to fill out some paperwork to go somewhere or need to talk to a captain to go somewhere, your free to take control of that character to get that red tape out of the way without needing to wait for someone who controls that character to reply, just so we don't have people being hung up on trivial matters.
Of course this is without its limits. It needs to be believable, IE, if the soul society is under attack, you wont be controlling the head captain to leave and go to the human world without a really good reason, or if its an area made by another player that they don't want you there prematurely. But if tis in peace time and your character is stuck in the soul society while everyone else is in the living world, just handle all that red tape yourself without needing to wait for the head captain or other captain to reply.