Gilly Joe Natanawan, also introduced as Gill, is A-ON’s main dancer. A-ON’s member-intro materials describe him as joyful, bold, magnetic, and driven by passion and energy.

Before A-ON, Gilly was part of ECLYPSE and came from the Top Class-related P-pop pipeline. Public profile sources list his birthday as May 8, 2000 and describe him as a rapper and dancer during the ECLYPSE era. His birth year should be treated as unverified unless confirmed by an official A-ON source.