Tsunade

"Hey Granny!" Naruto called to Tsunade, the Hokage of Konoha, as she exited her tower.

Tsunade rolled her eyes. "What do you want, Naruto? I'm very busy."

"I just have a small thing I want you to help me with."

Tsunade sighed, but followed Naruto to his zoo's entrance. "A zoo?" she asked. "You're wasting my time for a zoo?"

"Can you just see if the enclosures are safe for people to tour?"

Tsunade walked up to an empty, barren enclosure. "Looks fine, brat. What exactly--?"

Naruto shoved her into the enclosure from behind, and before Tsunade could protest, her eyes glazed over, and as they returned to normal, her clothes vanished and she dropped to her hands and knees. The enclosure around her began to shift and change to a flat, grassy landscape with a small animal pen in the corner.

"MOOOOO!" Tsunade practically yelled, looking up at Naruto with a blank, dumb expression.

"Heh...figures you'd be a cow," said Naruto.

He knew that in a few short minutes, Tsunade the cow would grow horny. But in the meantime...