Hot answers tagged keigo
さようなら is used mainly by school children, but adults use this less commonly in everyday conversations. Here's the list of possible expressions: お疲【つか】れ様【さま】です : Typically used after work. This is only polite enough to say goodbye to your colleagues. Don't say this to important external guests. (お先【さき】に)失礼【しつれい】します: Typically used when leaving (and entering) ...
You can always say 失礼します say goodbye or to excuse yourself (lit. "I'm being rude (by leaving))". This is probably the most common. There is also 失敬します, but I've heard this is rather old-man-ish and haven't heard anyone use in normal conversation.
It seems to be closest to 《接続助詞「に」＋係助詞「も」》, using 大辞泉's second meaning for も as a 係助詞: ② 他にも類似の事物が存在することを言外にほのめかす形で，ある事物を提示する。 To apply this definition here, I would say the も is emphasizing the otherness of His Majesty - intimating that it might not be the idea the speaker would have, but His Majesty has his own ideas.
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