I believe the Char indicates the style you are looking at is a character style.
There are four types of styles — paragraph, character, list, and table (list
and table styles are new as of Word 2002).
A character style can contain character formatting only, including font,
font size, font style (bold, italic, bold/italic), font effects (such as
small caps or superscript), character spacing, text borders and shading, and
even language settings.