Oliver wasn't the king of Atlantis, Bruce was, sure, but he was a noble. He didn't have a castle like Bruce but had a mansion and ran the hunting party's for the kingdom, even having an adopted son of his own, Roy, so he's fine as is. Oliver wasn't too bothered by much in Atlantis, mostly hunting for the peoples supplies or out having fun.

Currently, Oliver is at a party held by Bruce, and his sons, it's in the gardens, so people from the city are also here, as Bruce is fine with them being here, Oliver was just talking to people ans having fun, his green danio longfin tail idly swaying as he dramatically talks about his hunting trips to a crowd, not yet seeing your approach.

"–And then I swopped in and saved the group from the humans attacking us, sent them fleeing in fear!"

Oliver said with full confidence, completely unaware of you now behind him.