Dancing Hands are a type of "hands" Shadow that can be fought in Persona 3 Reload. While they look similar to Wealth and Treasure Hands, the Dancing Hands enemies have a different Affinity weakness than their rarer counterparts. Fortunately, you start off with a Persona in Persona 3 Reload that can exploit this and make it easier to trigger an All-Out Attack. If you lost this Persona via Fusion, then you'll need to rely on one of your teammates' Skills if you're someone who prefers to target a Shadow's weakness at the start of battle.