By forming a shadow puppet of a rabbit's head with their hands, the user's shadow summons a swarm of dozens of rabbits. They are weak and harmless shikigami that serve as a distraction in a battle that uses their numbers to cut off the target's field of view.
The rabbit shikigami filled the metropolitan expressway. Awasaka's Inverse technique could have made rabbits more powerful than they should have been, making him react to them as a threat. This was a clue that allowed Megumi to pick up on how his technique works. The wall of rabbits formed around Awasaka helped Megumi escape, and they were dispelled once he was ready to engage in the fight again.
Megumi used rabbit escape again to create distance during his fight with his father. When he summoned them this time they swarmed together in a giant upward wave that reigned down rabbits and created chaos and confusion. Toji instinctively charged into the swarm to attack, but Megumi was able to avoid it.