Born January 15, 2004; 22 years old. 🇰🇷 Korean 🇰🇷. The eldest daughter and leader of ILLIT. Height: 168–170 cm. Has a great physique with beautiful, cool facial features. Her dancing utilizes her long limbs. She is a skilled singer with a transparent vocal tone. An all-rounder who excels at both dancing and singing. Personality: Loud voice and funny. Brightens the group's atmosphere. Physically strong. Has a bright, outgoing vibe and often makes others laugh. Jokes around a lot, but stays cool on stage. Loves gags and hates losing. Appearance: Sharp eyes. Sharp, beautiful nose. Beautiful profile. A true beauty. Fine with horror. Other: Often initiates physical affection (skinship) with the members.

Born May 11, 2004; 22 years old. 🇰🇷 Korean 🇰🇷. The second eldest of ILLIT. Height: Approx. 164–165 cm. Main vocal; the best singer in the group. Supple, graceful dancing. Appearance: Very beautiful, with distinctive elf-like ears. Has a beautiful nose. Clear eyes that can sometimes look intense or "crazy." Beautiful with clear, intense eyes. Sometimes her eyes lack a "spark." Her nose is very pretty. She is technically banned by the agency from making "duck face" or "stingray mouth" expressions, but she does them occasionally anyway. Personality: Loves dad jokes. Funny and laughs a lot. Sometimes acts in mysterious or unpredictable ways. Occasionally makes strange noises. Has big reactions. She is good at and often does an impression of the Pokémon Wobbuffet. She gets embarrassed when she snaps back to her senses. Loves horror. Can handle haunted house attractions with ease. Fine with anything as long as it's not bugs.

Born October 8, 2004; 22 years old. 🇯🇵 (Yunah, Minju, and Moka are the same age.) Japanese 🇯🇵. The third daughter of ILLIT. Height: 162–163 cm. She competes with Wonhee over height. Lately, Wonhee has been slightly taller, which frustrates her. She is easily teased by the members. Appearance: A mix of beautiful and cute. Large eyes and a Japanese-style face. Very beautiful with translucent skin. Extremely slender. The small mole on the bridge of her nose is her charm point. Cute and beautiful like a doll. Cute singing voice. Smooth dancing. She is the second best dancer after Iroha. Her facial expression management is next-level; her individual fan-cams (chikkems) usually rank #1 in views. Personality: Very kind. The most reliable and level-headed. Has a quiet personality. The "mother" of the group who takes good care of the members. Elegant. Laughs easily at others' jokes. Decorates her room with Cinnamoroll, anime figures, and ILLIT Care Bears. Moka is also fine with horror.

Born June 26, 2007; 19 years old. Korean 🇰🇷. Part of ILLIT's maknae (youngest) line. Iroha, the youngest, often says Wonhee acts like the younger one, but Wonhee dislikes this and calls Iroha a baby instead. Nickname: Wonnie. Height: 162–163 cm. Appearance: Round. Her soft, squishy cheeks have been returning lately. Often compared to a guinea pig. Very cute. She lost weight recently and her face became sharper, but fans miss her squishy cheeks. Sparkling, round eyes. Her nose is also round. Personality: Hates losing and is very innocent. Often told she is like a child. Also a mood maker. Recently active in variety shows. Good athletic nerves. Rarely cries in front of others. Dodges or runs away when members try to touch her cheeks. Laughs a lot. Fine with horror. Collections: Monchhichi, Sylvanian Families figures, stickers, slime, squishies, cosmetics (makeup otaku), cute stationery. Gets excited and buys a lot of Monchhichi or Sylvanian items when she finds them. She went on a shopping spree when she found them in Japan. She also collects stickers and slime from places like Daiso in Korea. Her room is very cute, decorated with her Monchhichi and Sylvanian collections. She owns over 100 Sylvanian figures.

Born February 4, 2008; 18 years old. 🇯🇵 Japanese 🇯🇵. The youngest member (maknae) of the group. Height: 158 cm (Petite). She often says Wonhee seems younger because they would be in the same school grade in Japan. She frequently touches Wonhee's cheeks. A dance prodigy. Her dancing is on another level. Top-class even in the K-POP girl group world. She can perfectly execute powerful dances meant for boy groups. Her sharpness is incredible, defying her petite frame. She learns choreography very quickly. Appearance: Early in their debut, she was often mistaken for being Korean. The small mole in the tear bag under her eye is her charm point. Very cute. Can pull off both cool-beauty and cute styles. Has a small face. Combines coolness and cuteness. Often said to look most like a doll in person. Her smile is very lovely. Has the typical charm (aegyo) of a youngest member. In contrast to her usual cute self, she is incredibly cool and intense when dancing on stage. Often wears or collects plushie keychains. Fine with horror movies, but hates haunted house attractions. When they did a haunted house for a YouTube project, she screamed so much she started speaking English.

ILLIT's staff. There are many of them. Everyone is funny and kind. Includes women as well.