Sholto is very solitary and quiet by nature. He prefers to plan before acting, and uses his wits to solve a problem, rather than choosing to engage in combat.
He is resistant to the idea that there is any such thing as magic, and scoffs when Dirk or his friends suggest the possibility. When Rye appears in The Silver Door and utilises his magical items that the Fellan gave him, Sholto is initially skeptical of them and rationalises that they must be some sort of technological advancement. However, he seems to accept the possibility of magic by the end of the trilogy, and is not skeptical of the magic of the Fellan.
Sholto is afraid of heights, and has been since childhood. In The Silver Door, Rye begins to realise that Sholto has always had the feeling of not being good enough because of this, as he is unable to work on the Wall like Dirk and his father and working on the Wall is considered prestigious and a source of pride among the people of Weld.
As much as Sholto may have had the feeling of not being good enough due to his fear of heights, he is very intelligent, making a skimmer repellent in The Golden Door. It is also clearly stated in the Golden Door that all those of Southwall know that he's destined to become the Southwall healer after Tallus.