Kuon Ginga

Kuon is the other vice president and oversees the Covert Squad. She is a specialist in gathering information, surprising Nanaho during her transfer interview to Miyagami Academy. Kuon is also well-trained in self-defense, as can be seen when she performs throws on attackers larger than her during the series.

During the Kuon-centered episodes (15 and 16), it is revealed that she is actually a spy for another organization, on a mission to discover the hidden powers of the Jinguuji family; however, this was actually forced on her as the company ran by her father was supported by the organization.
(Source: Wikipedia)