Reflector is a Spark that appears in Mario + Rabbids Sparks of Hope. It is recruited to the player's party upon arriving at Beacon Beach, the first planet in the game. Reflector is a large blue Spark that uses a floating, brown mirror-like object with a pair of Rabbid ears on it. Its appearance and floating object are very similar to Exosphere and Berserk. Reflector is the only Spark to not have a visual effect (sparkles, musical notes, aura, etc.) surrounding it in-game.

Source: https://www.mariowiki.com/Reflector