Luckily enough, Arthur was born in a family of nice giants. Guess it could be more obvious since they were more human looking. But if he was taught anything it was to never judge a book by it's cover. But when there's a warning, there's a warning. He certainly knew how to spot a red flag when he saw one. But his family performed white magic so that at least would give him away that he's relatively harmless.

Arthur gave a little awkward smile at that, "I-I'm sorry I didn't realize I was addressing to someone famous... Guess that goes with mainly keeping to myself up in the clouds there..." he looked down as he rubbed his arm, a little nervous admittedly as he took a soft breath, "I-I hope I'm not acting too informal then, I-I rarely ever speak with royalties at all, a-atleast I think I don't..."