Justine Tan, known professionally as TJ, is a Filipino performer and member of AYO. Fan-maintained sources report that he serves as the group’s main vocalist and visual and is its youngest member, although these details still require formal confirmation.

TJ helps balance AYO’s hip-hop and performance-heavy identity with a stronger melodic presence. His reported vocal role gives him an important place in shaping the group’s sound as it develops beyond its first pre-debut release.

As the reported youngest member, TJ also represents the youthful side of AYO’s image and the potential for further artistic and vocal growth.