I registered just to write this post, hopefully I won't get to much banter.
I am from Trondheim, Norway (please excuse any grammatical errors) and have followed Markus Henriksen since he played in Rosenborg's academy. Originally he was schooled as a running midfielder in a classic 4-3-3. He has great stamina and composure, and is very hard-working in midfield. His father played as a CB in Rosenborg and was nicknamed Rambo for his dominant personality and courage. As his father, Markus plays with his heart, and even though he is more elegant, and have more technical quality than his father, he is not afraid to bleed for the club.
In later years he has become more of a complete midfielder, being able to play as an inverted winger on both flanks, a running midfielder and even as a forward. His best role though, is, as many of you have stated, a CAM.
I am confident that he will shine in Hull, and can only congratulate you on a superb signing.
Good luck in the premiership!