Wendy Satou possesses striking beauty but can be aloof. Her membership in the High Card society was facilitated through her father's connections as a skilled swordsman. Although she is often serious, she struggles with the carefree attitudes of Finn and Chris. Unlike others in the group, Wendy takes pleasure in indulging in food and drink, which can elevate her mood and warm up her demeanor when imbibing. She works in accounting and clerical duties at Pinochle's Old Maid branch.
According to Chriss testimony on the bonus drama CD, Wendy and Chris were childhood friends because their father was a member of High Card in the past.