Names: Hwang Heather, Hwang Hillary, and Hwang Hazel
Nicknames: Haze (for Hazel, from her sisters, and SKZ,) Heath (for Heather, from her sisters, and SKZ,) Hil (for Hillary, from her sisters, and SKZ.)
Age: all three of them are seventeen, almost eighteen
Personalities: shy (Hazel) overprotective (Heather) and chill (Hillary)
Family: Karai (half-sister,) the turtles (adopted brothers,) and Master Splinter (y'all should know) Hwang Hyunjin (adoptive older brother)
Looks: in the pictures below
(Heather:)
(Hillary:)
(Hazel:)
Backstory: even though they were born on the same day, they all couldn't be more different, Heather is the "Mini Mom" since they were adopted as Hwang Hyunjin's little sisters, he is happy that the trio decided to be in SKZ, (mainly as backup dancers, but they can sing, as well) When one fateful tour brought the trio to New York. They met Karai, and the turtles, becoming close friends with them, only having to leave soon after their New York performance.
Voice claims:
(Heather:) Younha
(Hillary:) I.U.
(Hazel:) Kim Jisoo
In the live action TMNT movies The Hwang triplets look like their voice claims
Heather
Hilary
Hazel
(I am planning to write a story that includes these three, idk when, but don't worry, because my plans alway work out, sometimes.)