This guy can talk you to death, and that's quite literal.
Insidious, ever present...
Callen's personality is shifting, ever changing. Anti-social by habit, he prefers his own lonesome, but when forced into situations when contact is required, he is smooth, excellent, able to read the subtlest of signals. He would've been at home amongst the most prestigeous of high circles...
He sees little in the way of black or white, instead referrencing points as 'useful' or 'not useful'. Interesting things will capture his attention for a little while, but mostly he will be bored by almost everything that happens around him.
Various herbs and powders, a small pocketknife. A small book full of herbalistic information.
Have you ever encountered the life where you are forced to learn something. Despite your own dislike and even abhorance of the subject? Where the parents use everything they've got to make sure their child is brought up and learns exactly what they want?
This is how Callen was brought up. With constrictive parents forcing him to learn his way around the smooth social edges. Forced to learn the intruiges of the social life, he hates the upper class, of which he is technically a part of.
--(Unfinished, due to studies.)