The bunny hopped up to Fairy Tail's doorstep and leaped up to ring the doorbell, but did not jump high enough. After several trial-and-errors, an amused Erza stepped up from behind the bunny and pushed open the door for it. Reaching into its magical backpack, the bunny pulled out a blue light pen and wrote its thanks in the air.
"You're welcome!" Erza said. With a smile, she greeted rather cheerfully, "Welcome to Fairy Tail!"
"Wanna fight, flame-brain?" Gray seethed.
"Why? You just beggin' to lose?" Natsu fumed.
"Dragon breath!"
"Pervy snowman!"
The two began to brawl, throwing punches left and right. Unfortunately for Happy, he just so happened to be nearby when Natsu accidently hit him.
"Whyyyyyy, Naaaatsuuuu? ‼" Happy asked as he flew across the room. With a clang, his head bonked into Erza's armor, rendering him unconscious. The bunny used the unconscious Exceed as a stepping stool to hop up onto Erza's shoulder.
"My friend here has something to write!" Erza boomed. The loud clamor was instantly reduced to silence. The bunny picked up its pen.
'Hi!' Bunny wrote. The guild greeted Bunny back. Bunny continued, 'I am actually female mage not in a guild. I was sent to you by my fathers when a dark mage placed an ancient transformation spell on me, hence the bunny appearance. I was wondering if you could undo the spell and help me track down the dark mage. He stole an important letter for your guild master.'
"Fathers? You have more than one?" Lucy asked. She mumbled, "I bet you get, or got, several times the love that I never got."
"Ahem, Levy and I could help." Freed reported, sensing the awkwardness. Levy nodded. "We noticed the runes on your paw."
Bunny hopped down from her perch on Erza's shoulder so Levy and Freed could inspect the runes. Words like "Interesting" and "That's odd…" could be heard from the two rune-based magic users.
"Well, I'm sorry this is all we could conclude, but the magic is a forbidden magic that we don't recognize." Levy voiced. Freed nodded with a confirmative, "Hai."
Suddenly, Bunny scampered off. At the same time, a swirling green portal appeared in the pace where Bunny was standing.
"Hey stop that girl, err, bunny!" A mysterious man demanded, stepping out of the portal. His guild mark flashed by when his cape swished, showing he was a member of the dark guild Purple Thunder. Erza drew one of her swords and held it to the dark mage's neck. She interrogated, "How do you know the bunny is a girl?"
"Uh…" he started. Then, Bunny interrupted, "Eek‼ It's him!"
"Oh, hohoho!" Cana laughed drunkenly. "The tables have turned!"
"The hell?" Gray muttered. "What tables?"