Nome: Jaehyuk (재혁)
Nome completo: Yoon Jae Hyuk (윤재혁)
Nascimento: Julho 23, 2001
Tipo Sanguíneo: O
Sub-Unit: Treasure B / TREASURE
• Jaehyuk is left-handed.
• Jaehyuk was street casted after school.
• He has been approached by SM, JYP, CUBE, Woollim, Pledis & Yuehua amongst many others.
• Jaehyuk considers Seokhwa as his best partner. (Jaehyuk’s Survey)
• He was eliminated from the show in ep. 9.
• Jaehyuk has been brought back for the final.