I think tu are kidding around but let me ask tu this: Did tu mean the members of the musical group o the members of the Black rosado, rosa club?
BLACK rosado, rosa (블랙핑크) consist of 4 members: Jennie, Lisa, Jisoo and Rosé. The band debuted on August 8th, 2016 under YG Entertainment. BLackPink ...
por the way, "is" refers to "one." I know what tu meant but when asking about más than one tu can use "are" instead.