Kaichul, like many Erudite necromancers, learned his trade in the hidden city of Paineel under the tutelage of the most powerful spellcasters on Norrath.  From the moment he opened his eyes to the second he closed them before going to sleep, and even in the dreaming states in between, he lived and worked along death.  Kaichul displayed an excellent knack for spellcasting and memorization, as well as an amazing drive and ambition to learn, making the Heretics proud : often his instructors would boast of him and his abilities as when they spoke in delegation with their hated foes, the Erud High Council.  However, there was always a coldness to his passions that everyone seemed to note and, while it hastened his training and his rise through the ranks of Paineel's casting elite, somewhat ostracized him from social contact with his bretheren.  In honesty, Kaichul couldn't care less about the Herectics, Paineel, or even the isle of Erud for that matter; to him, all that was important was filling his mind with as much information as possible, to become a repository of all the necromatic information in the world.  After he learned all he felt he could from his instructors (which, he was aware, was not all that they knew -- they feared him too much to share all their secrets with him), he set out on his own into the world beyond, absorbing every piece of knowledge he could come across.

Being in the presence of Kaichul is like standing in a stone room that, while well-lit and windless, has been in the cold so long that one cannot help but shiver as the warmth is drained out of their body slowly and in all directions by some unknown force.  He could care less about the Heretics, Paineel, Erud, and all of Norrath for that matter, as long as he has gotten all he can out of it.  It is one reason many of the stronger necromancers in Paineel avoid Kaichul when they can, for they know they have secrets he wants, and know that should he decide to one day tear their minds right out of their skulls to read the information within like a book that he will do so without batting an eye.  He is not a gale of evil, for he does not waste his time with those that cannot provide him information and does not actively hunt the forces of good for any cause, he merely wishes to gain information and will do all he can to gain it as fast and efficiently as possible.  If he has to slaughter an entire city to get it, though, he will not give any atrocity a second thought...  It's all numbers to him.