Kieran & Kiel - Tairen Soul series by C.L. Wilson
Tairen Soul was an amazing series with unforgettable characters and two that I would love to know more about were Kieran & Kiel. They were fierce warriors and I loved every battle scene they were in. They were also funny and caring and the part they played in taking care of the twins made me love them even more. A spin-off with Kieran & Kiel will likely never happen, but I would be the happiest girl in the world if it did =)
Professor Randolph Lyall - Soulless series by Gail Carriger
I must admit, I have a crush on Conall Macon's beta. He's calm and reserved, a true gentleman who is loyal to his pack. He doesn't consider himself a fighter, but he can kick some ass when he has to. He was one of my favorite characters in the series and I would gladly read a Randolph Lyall spin-off.
Which minor characters do you think deserve their own books?