Shona and Dugald are both good characters. Shona is free-spirited, athletic, and a magnet for trouble. Dugald is more aloof, but his attraction for Shona is believable. Even more enjoyable are the secondary characters, particularly Shona's parents. Their interaction with Shona and Dugald, and their still-apparent love for each other, really added something to the story.
Most heroines seem to be orphans.
If their parents are alive they are often out of the country, or else flawed in some way so that there is distance between the heroine and her family. It was refreshing to see an alternative. However, the secondary characters are both a strength and a weakness. If this is your first time reading Greiman, as it was mine, you may feel like you have arrived late at a party. From what I could tell, Highland Scoundrel is preceded by four other inter-related books, all starring various members of this family.