The Angel Line is one of the two MAMAMOO sub-unit made up of Solar and Wheein; it is also the name of the friendship pairing between the two. They are considered to be the most "angel-like" pairing and both are the main vocals of MAMAMOO.
- 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.
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