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.
By Anne Marie Helmenstine, Ph.D. Solute Definition: The substance that is dissolved in a solution. For solutions of fluids, the solvent is present in greater amount than the solute. Examples: salt in water.