Iris has an impression that the artist was not a huge fan of decadence as depicted and was willing to suggest that much to a keen observer, but she'd definitely need time to have more than her general impression if she would be to explain that conclusion to anyone else.

When Iris sees the man, she's pretty certain he's not ordinary human. Her best guess (and she places a high confidence in it) is that the man is a dhampir. As for the room he's in, the stone walls, floor, and ceiling are polished to an almost mirrorlike sheen. The arching ceiling is supported by twin rows of columns, all of which have been carved to resemble the same beautiful woman dressed in revealing robes. Iris does not see anyone else in the hall, but the far side is now rather dark.

"How long, you say? Long enough to get bored, but not long enough to get mad. I have my orders and I'll let you know that the person issuing them is alive and well, so I'm afraid you'll get no further enlightenment here."

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Does not seem to be lying and seems confident.