The brand reputation analysis of rookie idol groups in December 2025 showed that KIKI ranked first, CORTIS second, and HEARTS TO HEARTS third. The Korea Corporate Reputation Research Institute analyzed 9,873,579 pieces of big data on rookie idol group brands from November 2 to December 2, 2025. This is a 27.11% decrease compared to 13,545,178 pieces in November. The brand reputation index is a metric calculated by reflecting the impact of consumers' online behavior on brand consumption. Through this index, positive and negative evaluations, media interest, and consumer communication regarding rookie idol groups can be measured.

The rookie idol group brand reputation is analyzed by combining boy groups and girl groups and includes participation index, media index, communication index, and community index. This analysis targeted idol groups that debuted after 2023. The top 30 rookie idol groups in brand reputation for December 2025 are as follows: KIKI, CORTIS, HEARTS TO HEARTS, TOURS, EYELET, BABYMONSTER, XLOVE, KICKFLIP, IZNA, ALPHADRIVEONE, MIYAO, IDIT, NEXG, EIGHT, CAT'S EYE, HORIZON, EUNIS, LISENNE, NAWORDAYS, ARTEMIS, NEWBEAT, AHOP, CLOSE YOUR EYES, GENIUS, BABYDON'TCRY, BIGOCEAN, SOOPIA, KIRAS, SAYMYNAME, CANDYSHOP.

KIKI, which ranked first, consists of Jiyu, Isol, Sui, Ha-eum, and Kiya, recording a participation index of 127,792, media index of 171,874, communication index of 450,008, and community index of 316,646, resulting in a brand reputation index of 1,066,320. This is a 10.13% decrease from 1,186,529 in November.

CORTIS, ranked second, consists of Martin, James, Juhun, Seonghyun, and Geonho, recording a participation index of 218,540, media index of 271,705, communication index of 287,140, and community index of 205,233, resulting in a brand reputation index of 982,619. This is a 24.60% decrease compared to 1,303,125 in November.

HEARTS TO HEARTS, ranked third, consists of Carmen, Jiwoo, Yuha, Stella, Jueun, Aina, Ian, and Yeon, recording a participation index of 161,210, media index of 208,641, communication index of 276,517, and community index of 108,605, resulting in a brand reputation index of 754,973. This is a 17.02% decrease from 909,832 in November.

Ranked fourth is TOURS (Shinyu, Dohun, Youngjae, Hanjin, Jihoon, Kyungmin) with a brand reputation index of 689,041, a 34.75% decrease from 1,055,945 in November. Fifth place EYELET (Yoona, Minju, Moka, Wonhee, Iroha) recorded a brand reputation index of 590,496, a 40.15% decrease compared to 986,677 in November.

Koo Chang-hwan, director of the Korea Corporate Reputation Research Institute, stated, "KIKI ranked first in the rookie idol group brand reputation rankings for December 2025. The rookie idol group brand big data decreased by 27.11%. Detailed analysis showed that brand consumption fell by 26.27%, brand issues by 34.62%, brand communication by 18.92%, and brand diffusion by 29.76%."

He added, "In link analysis, KIKI recorded high scores for 'release,' 'launch,' and 'comfort,' and in keyword analysis, 'ToMeFromMe,' 'web novel,' and 'Genzyme' stood out. The positive-to-negative ratio analysis showed a positive rate of 85.90%."

The December 2025 rookie idol group brand reputation analysis included KIKI, CORTIS, HEARTS TO HEARTS, TOURS, EYELET, BABYMONSTER, XLOVE, KICKFLIP, IZNA, ALPHADRIVEONE, MIYAO, IDIT, NEXG, EIGHT, CAT'S EYE, HORIZON, EUNIS, LISENNE, NAWORDAYS, ARTEMIS, NEWBEAT, AHOP, CLOSE YOUR EYES, GENIUS, BABYDON'TCRY, BIGOCEAN, SOOPIA, KIRAS, SAYMYNAME, CANDYSHOP, IF I, A1, TRACER, VVS, USPHERE, HITS, LOST, NUERA, BADVILLAIN, BUBBIE, ASCENT, UNICODE, LUNATE, WITCHES, ALL HOURS, MAIDIN, IN A MINUTE, BB UP, S2IT, BEWAVE.