Going Viking in a Bookstore

Kimber An did a review of The Viking's Captive Princess on Enduring Romance that made me smile. In particular she said -- This is book three in Michelle Styles' Viking series and I can guarantee there will be more (because if I don't hear more about a certain secondary character, I'll go totally Viking in the bookstore).

I would love to know which secondary character she means. There are two possibilities really --Erik the Black and Thrand. Although I think she means Thrand and it may happen, ...