Brand Reputation Index is created through the analysis of the brand big data, as it found out that the online habits of consumers have a significant impact on brand consumption. As of January 2021, the top 30 brand reputation of girl group members are as follows: BLACKPINKŌĆÖs Jennie, Oh My GirlŌĆÖs Arin, BLACKPINKŌĆÖs Jisoo, (G)-IDLEŌĆÖs Soyeon, (G)-IDLEŌĆÖs Yuqi, MAMAMOOŌĆÖs Hwasa, BLACKPINKŌĆÖs Ros├®, BLACKPINKŌĆÖs Lisa, TwiceŌĆÖs Sana, TwiceŌĆÖs Nayeon, AprilŌĆÖs Naeun, TwiceŌĆÖs Momo, SNSDŌĆÖs Taeyeon, MomolandŌĆÖs Nancy, LOONAŌĆÖs Chuu, aespaŌĆÖs Karina, (G)-IDLEŌĆÖs Sujin, IZ*ONEŌĆÖs Jang Won Young, (G)-IDLEŌĆÖs Miyeon, aespaŌĆÖs Winter, (G)-IDLEŌĆÖs Shuhua, (G)-IDLEŌĆÖs Minnie, Red VelvetŌĆÖs Joy, TwiceŌĆÖs Mina, Red VelvetŌĆÖs Irene, TwiceŌĆÖs Dahyun, Oh My GirlŌĆÖs Jiho, Oh My GirlŌĆÖs Hyojung, TwiceŌĆÖs Ji Hyo, and Oh My GirlŌĆÖs YooA. On the first, BLACKPINKŌĆÖs JennieŌĆÖs brand was analyzed with a brand reputation index of Ā 2,855,331, including the participation index of 738,682, 533,276 media index, 855,121 communication index, and 728,252 community index. Compared to her brand reputation index from last December, it had dropped by 18.91%. She had a high number of ŌĆ£created, sexy, and seductiveŌĆØ from the link analysis, and ŌĆ£YouTube, Solo, InstagramŌĆØ from her keyword analysis. JennieŌĆÖs positive ratio analysis resulted in 72.55%. In the second place, Oh My GirlŌĆÖs ArinŌĆÖs brand was analyzed to have a brand reputation index of 2,415,960. This includes a participation index of 923,766, 486,881 media index, 579,533 communication index, and 425,780 community index. Compared to last DecemberŌĆÖs brand reputation index of 2046,259, ArinŌĆÖs had increased by 18.07%. ┬Ā Source (1)