- EunYi (Eun/seo and Xuan Yi)
- XuanYeon (Xuan Yi and Ju/yeon)
- JuYi (Ju/yeon and Xuan Yi)
- They both have brown eyes.
- They can both play piano.
- They both have a sibling.
- They are both in the sub-units Joy and αγύρτης.
- They are both actresses.
- Xuan Yi has black hair but Eunseo has light brown hair.
- Xuan Yi was born in Haikou, Hainan, China but Eunseo was born in Incheon, South Korea.
- Eunseo can play guitar, drums and tambourine but Xuan Yi cannot.
- Eunseo is a member of Y-Teen but Xuan Yi is not.
- Xuan Yi was born in 1995 but Eunseo was born in 1998.
- Xuan Yi has a younger brother but Eunseo has two older sisters.
- Xuan Yi is a member of Rocket Girls 101.
- They are both in the group Cosmic Girls.
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