Cheshire Cat

チェシャ猫

The Cheshire Cat is a demonic feline introduced in episode 24. Aaron and Sand summon him when they require assistance deciding their next steps after Sand inadvertently brings Ranze and Yoko along during Shun's kidnapping.
Once Shun and Yoko discover the truth about Ranze's parentage, the Cheshire erases their memories (leaving Ranze as the sole rememberer among the three kidnapped individuals) to prevent Sand and Aaron from facing repercussions for the error.