Who's the princess? His sister? And didn't Grayson saw him butt naked? HAHAHAHA

Naomi, she's from that previous chapter. One of his sex partners. Novel grayson didn't really call her that, but the adaptation added it.

Naomi is Keith and Grayson's ex (more like ex s3x partners) and she's friends with Keith, Yeonwoo and Chase and frenemies with Grayson. Hahahaha Naomi only sustain friendship with Grayson to see his downfall.