Soo-Min has 3 siblings.
Two of them are her triplet siblings (Soo-Min is a triplet)
The other one is a younger sibling.
Soo-Min's triplet sister, Soo-Mi is identical to her and they look the same.
Here is a photo of Soo-Min (Dark blue skirt) and Soo-Mi (Purple skirt)
Soo-Min's triplet brother, Soo-Geun is not identical to her (which is obvious, considering that they're different genders)
Here is a photo of Soo-Min and Soo-Geun
Soo-Min has a sister named Seon-Mi
She got more of the Filipino attributes than Korean. People often think she's adopted
and that's all of Soo-Min's siblings.
Soo-Min is the second oldest out of all her siblings, Soo-Mi is the oldest.