>>714981325
that's Misaki, who was the first OC, I guess I forgot to cover her, Nagisa is her onee-chan, but Tamaki also plays as her "big sis" Tama-nee.
She is your personal assistant on the island.

as for tropes...
Luna: Kuudere
Tamaki: Flirty girl
Nagisa: Hostile Tsundere
Fiona: would be yandere but she's JRPG protagonist level dense
Sayuri: big sister, also plays into anime wife tropes
Patty: genki country girl
Tsukushi: himejoshi (a yuri version of fujo)
Lobelia: kind of a femme fatale, constantly makes comments about if her father knew about (You) and her he'd send an agent to kill you
Nanami: GND, also a bit of a toned down kogal
Elise: literal girlboss
Koharu: shy girl into romance novels, kind of a dandere
Amy: Tsundere (cover for shyness)
Shandy: flirty girl
Yukino: think Marin, a nice gyaru
Shizuku: dandere/kitsune
Azusa: delinquent/sukeban (has a motorcycle even)