Short answer
The Sun is the Korean birthday type of people born on a yang Fire day (Byeong Fire, 丙). In love: warm, loud and generous. Loves big and fast, hates being ignored, and lights up every room including the group chat.

Ex
Why a Sun ex comes back loudly, or not at all
A Sun ex tends to come back quickly and openly if they still feel warmth, or moves on visibly and fast if they feel unappreciated; there is rarely a quiet middle.
Read itSituationship
The Sun in a situationship: all the heat, none of the label
A Sun in a situationship gives intense attention early and then can lose interest when things go calm, so the relationship often feels amazing and unclear at the same time.
Read itGhosting
Why a Sun stops texting: when the brightest person goes dark
A Sun going quiet usually means they felt unappreciated or got swept into something new; it is rarely cold calculation, and they often reappear with an enthusiastic explanation.
Read itRed flags
Sun red flags: when warmth turns into weather
The main Sun red flags are confusing intensity with compatibility, creating drama when life gets calm, and needing constant attention; their warmth is real, but so is the sunburn.
Read itCrush
How a Sun acts with a crush: everyone knows except you
A Sun with a crush is obvious to everyone around them: they light up when you arrive, text you first, and make plans with you at the speed of a group chat.
Read itWho the Sun gets along with
In saju compatibility, the Sun clicks most easily with:
- The Jewel (90/100): Heavenly Combination 丙辛: sunlight on a jewel
- The Climbing Flower (79/100): The flower turns to the sun: bloom season
In saju compatibility, the Sun has the most homework with:
- The Ocean (53/100): The sun over the ocean: magnificent, but who sets first?
- The Sword (48/100): The sun and the blade: forging heat, sharp sparks
Full profile: The Sun personality, work and friends. Every pairing: compatibility.