As tight as security is, I can't exactly say I'm surprised Rembrandt found a way past. He's not human, and the security is only trained to look for what they understand.

[Rembrandt likely has powers beyond the scope of his own understanding, and he's the most talented mage in Nohr! So yeah, not surprised, but severely disappointed anyway.]

I am. Lately, I'm the only one King Garon has permitted to see to and tend to him. As you can see, he clearly isn't doing well.

[He definitely looks like he's sick in the photo, probably in the process of dying.]

I... Well, I suppose there's no real point in hiding it. The information listed about me is accurate, albeit rudely-worded. I do seek to be the next King of Nohr, and I'm very close to accomplishing that. Should something happen to King Garon while I'm gone, however... Well, it will fall to his eldest son, Prince Xander.

[So it's a threat on multiple levels. If they kill Garon then they're killing someone he actually does kind of care about, and if they kill Garon then they're effectively rendering all his hard work completely pointless. And also whenever he returns Xander will probably have him killed, but details.]