As they are considered to be the most "angel-like" pairing and both are the main vocalists of MAMAMOO, their line name became "Angel Line". Their other name "WheeSun" comes from the combination of Wheein and Solar's names. Another name of theirs called "MC Dduk & Ddak" was created by Moonbyul during the HIP era.
- Solar is older than Wheein by four years.
- Solar is the second tallest of MAMAMOO while Wheein's the shortest of the group.
- Solar was born in Gangseo-gu, Seoul, South Korea, but Wheein's born is Jeonju, Jeollabuk-do, South Korea.
- Solar has a Youtube channel while Wheein doesn't have one.
- Wheein has tattoos while Solar has none.
- Solar has an older sister while Wheein doesn't have any siblings.
- Their blood types are B.
- Both can play the piano.
- Both have pets.