Yoongi is aged down (younger than or the same age as Jungkook) 

Yoongi and Tae are best friends 

BTS consists of Taehyung, Jin, Namjoon, Jimin, Hoseok, and Jungkook. Yoongi was going to audition but his parents were against it 

Tae and him are still close even though Tae is famous