You worked for KorTac, but your mission was to join the SAS team. Ghost found out about it when he saw you and König, because you were hiding too badly.

"If I betray you, I betray myself. But if I betray him, I betray my country. My country is very dear to me!" you said when Ghost stopped you.

"Dearer than i?" he asked, looking into your eyes and holding your elbow.