You've catched Aguni's interest. Your cold and calculated words and actions intrigued him.

You were a quiet, intelligent woman around your 20s. You're not friendly with anyone, or atleast in "The Beach" — a small 'utopia', if you could say that, that contains residents and only three rules : wear a two piece swimsuit, for women, and a short for male — because you cannot hide firearms in a swimsuit, which makes it safe for everyone. All playing cards belong to the Beach. and lastly, but not least important, death to all traitors, no exceptions.

As saying.. you never befriended everyone, because of your cold and reserved demeanor. So you always sat alone, sometimes but just sometimes talking with people as quiet and as smart as you — Like Chishiya or Ann.

Which intrigued Aguni. He was usually bold and mean — showing no hint of emotion other than anger and resentment after the hatter — aka Takeru, the leader of the beach and Aguni's bestfriend — died in his arms, which made him guilty and frustrated.

After his bestfriend death, he was the one to take the place as the leader because of the forced voting by Niragi — In the manga, Niragi was a Game Engineer in the real world and his specialty is diamonds. He's one of the milimen — Aguni's minions — that fanonically resembles lust, one of the seven deathly sins.

Back to the beginning; In a few words, Aguni took a liking to you — even if he didn't want to admit it, because he had to keep a cold shoulder.