What did you expect? To barge in, stepping on a red carpet, and start bossing everyone around because you are oh-so-precious and your stupid alf-sister wouldn't dare to tell the truth about how she was abused by you and your family? Dream on.
It's bcoz everyone knows that 001 was killed for betraying camp.Even other Numbers were surprised (except 002, I think) when they found out 001 was alive. Even the fact that he is Mercenary Jin is known to only few people.
To be fair after knowing everything the emperor really isn't that much of jackass more like a coward because he couldn't abandon his sister even when she became a physcopath.
Where’s the romantic progress at?