Blog · October 17, 2026
Every BTS member's type, read from their saju, and the three Rival pairs inside the group
Seven birthdays, six types, and a group chart with more Rivals than anything else. BAAK read what every BTS member is to every other one.
Saju is what Korea calls the birth chart. It is read from the day you were born, and in Korea people check it before a wedding, a new job, or a big move.
So we checked BTS.
Seven birthdays went in. BAAK knows nothing else about them: no songs, no stages, no ten years of variety-show clips. Here is what came back.
The seven types
09/10

TAU
I don't need the hype. You do.
RM is a TAU: "I don't need the hype. You do." The type that runs on its own fuel. A leader famous for his reading list. Fair.
04/10

MOTHLIGHT
I knew before you said it.
Jin is a MOTHLIGHT: "I knew before you said it."
03/10

SEVEN
You panic. I lock in.
Suga is a SEVEN: "You panic. I lock in." The type for whom pressure is when you finally move.
10/10

FLARE
Too much? That's the point.
J-Hope is a FLARE: "Too much? That's the point." The type with more force than the room asked for. If you have seen him dance, you know.
01/10

FOX
I clocked you. Keep talking.
Jimin is a FOX: "I clocked you. Keep talking."
04/10

MOTHLIGHT
I knew before you said it.
V is a MOTHLIGHT, like Jin: "I knew before you said it." The type that notices the signal nobody is listening for.
02/10

PEACH
It's my story. You're in it.
Jungkook is a PEACH: "It's my story. You're in it." The type that makes life worth it. The youngest, the golden one, and the chart gave him the line that sounds most like a main character.
Seven members, six types. Jin and V share one.
What they are to each other
BAAK has ten roles one person can be to another. Across all twenty-one pairs in BTS, the most common one is:
Rival. Unspoken competition. You sharpen each other, but nobody ever actually admits defeat.
Three pairs, and each one is Rival in both directions:
- Jimin and Jungkook. The two who push each other hardest.
- Jin and J-Hope.
- Jin and V. Same type, and still Rivals. Jin is in two of the three.
Not the bad kind. The kind where neither will let the other coast.
The Mirror: J-Hope and V
Mirror. Exact same frequency. Which means you can't stand their flaws without hating your own.
Born on the same kind of day, exactly. The only Mirror in the group.
The eldest and the youngest
Jin is Jungkook's Mentor: they clarify your chaos. Jungkook is Jin's Fun One: effortless chemistry, peak laughs.
The oldest member and the youngest, and the chart drew it exactly the way fans have watched it for ten years.
Two more worth knowing
V is Jimin's Mentor, and Jimin is V's Fun One. Same age, and still one of them steadies the other.
Jungkook is V's Partner in Crime (they validate your worst impulses), and V is Jungkook's Safe Place (zero judgment, total comfort). If you have watched the two of them together for more than five minutes, you already knew.
Your turn
You are somebody's Rival. You are somebody's Safe Place. BAAK reads which, from your birthday and theirs, the same way it read these seven.
Read from public birthdays (Wikidata). Types use the birth date only; a pair's role comes from the two day masters, which a birthday fixes. Bandmates, not romance: BAAK's roles describe any relationship. For fun: this is what the chart reads, not a claim about anybody's private life.