Conversation so far:
Where was Sandara Park born?
Busan, South Korea.
Who were her parents?
She is the daughter of Ik-Su Park, a trading businessman, and.
who is her mother?
and Kyung Ran-Kim.
did she have siblings?
She is also the sister of Thunder, a former member of K-pop boy group MBLAQ, and.

Question: who is her other sibling?
Self-contained rewrite: who is Sandara Park;s other sibling aside from Thunder?