"Never underestimate a Wild Card's potential," says Yu from somewhere with a sinister chuckle. "Even when I'm not using a Persona."
Again, Yu used a holo-projector to trick Akechi into thinking he was waiting in the open, so all Loki grabs is thin air. However, Level 1 Izanagi would phase in and knock Loki away before bludgeoning Akechi. Once Akechi's had enough, Yu would recall Izanagi and cut open his chest, removing his heart.
"In the words of the Demi-Fiend," deadpans Yu, staring Akechi in the eyes and severing his aorta. "That's one more god rejected."
A large spurt of blood coats Yu from head to toe as he discards the heart, destroys the toaster with several shots from his katana, and walks straight into Hell itself, which is actually the tunnel Yu used to enter the arena. Before he disappears...
"Izanagi," he says. "Ziodyne. Eviscerate this weakling. Leave no particle behind."
The Persona electrocutes the corpse to the point where Akechi is charred beyond recognition before being recalled.