With the six non-special attributes being Strength, Quickness, Body, Charisma, Intelligence, and Willpower, and two of the three special attributes relating to magic and the third being derived, this is arguably a six attribute system.
The definition of solicitous is  someone who shows concern, care or eagerness. An example of someone who would be described as solicitous is a hovering and nervous parent.
A solicitation letter is one in which you are openely invited by others. For example, a letter to apply for an open vacancy. A solicited letter is one that you requested to receive. For example, a letter you requested to receive to a company event or a job opportunity.