Place the cubed dragon fruit in a blender and pulse until smooth. Strain the puree through a fine mesh sieve into a pitcher if you prefer a smoother drink.

Add the tequila, lime juice, and agave nectar to the pitcher. Stir well until the agave dissolves completely.

Pour in the chilled sparkling water and stir gently to combine without losing too much fizz.

Fill four glasses with ice cubes. Divide the mixture evenly among the glasses.

Add a lime wedge and a slice of dragon fruit to each glass before serving.