Based on available information, it appears the question is asking which BLACKPINK member has a close relationship with a BTS member.
According to reports, Jennie from BLACKPINK has been linked romantically to V from BTS.
- Jennie and V: Dating rumors have circulated for some time, suggesting a close relationship between these two members. (Reference: Report dated 06-Dec-2023)
Therefore, if "close" refers to a romantic relationship, Jennie is the BLACKPINK member mentioned in relation to a BTS member (V).
