"Thank you." In comparison to some of the other dreamers nearby, Sebastian seems somehow more solid than many of them. There is a clear space around him that easily differentiates between who he is and his surroundings. As a result of a great deal of practice resisting legilimency, it's fair to deduce that he has a well-defined sense of self.

"It's odd that the way we view ourselves in dreams can be so radically different from the everyday. You'd think that it -," he stops, frowns and gestures that he needs a moment to shuffle his thoughts to better express what he wants to say. "I was going to say that you'd think it would be easier to be someone else in dreams, and certainly, a false-face isn't too difficult to slip on," he makes a practiced gesture with his right hand and his appearance slides into that of a different young man and then back into Sebastian's own. In the waking world, his magic is slowly coming back to him in fits and starts, here it works as well as it ever did. "But I get the feeling that becoming someone else would grate more. What do you think, Mr. Holmes?"

With his subconscious closer to the surface, Sebastian is less guarding and is willing to talk more freely. He's happy to be here in a dream in general, quite pleased to talk to Mycroft, whom he finds interesting, and curious to see how he can affect the world around him.