Xilonen functions as a Geo applicator and debuffer, scaling well with Elemental Mastery to maximize shred effectiveness on enemies. Pairing her with a Geo on-field carry like Alhaitham or Navia allows consistent Geo aura application and reaction setups. Build toward Elemental Mastery and Energy Recharge with 4-piece Viridescent Venerer or similar shred artifacts; a Sword with EM mainstat or secondary scaling helps unlock her full support potential.