- MeiA (Mei Qi and Seol/A)
- HyunQi (Hyun/jung and Mei Qi)
- MeiJung (Mei Qi and Hyun/jung)
- They both have brown eyes.
- They both cannot play and instrument.
- They are both in the sub-unit ενύπνιον.
- SeolA has silver hair but Mei Qi has purple hair.
- SeolA was born in 1994 but Mei Qi was born in 1998.
- SeolA is a lead vocalist but Mei Qi is a main vocalist.
- SeolA was born in Seoul, South Korea but Mei Qi was born in Henan, China.
- Mei Qi is an actress but SeolA is not.
- SeolA has a sister but Mei Qi does not.
- SeolA is in Y-Teen but Mei Qi is not.
- SeolA is in the sub-unit Sweet but Mei Qi is in the sub-unit Natural.
- Mei Qi is in the group Rocket Girls 101 but SeolA is not.
- They are both in the group Cosmic Girls.
- They have a similar fashion sense.
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