First off, I want to say HI! This is my first EVER fanfiction story, and my first EVER Bleach or Harry Potter fanfic! Yay! I would also like to say this is my first EVER Bleach and Harry Potter Crossover fanfic! BTW, so everyone knows, in this fanfic, the winter war has ended, Yamamoto made Ichigo 5th Division Captain, Ichigo then making Rukia his lieutenant and Hinamori his 3rd seat.

Disclaimer: I own nothing.

Fight or Flight

Chapter 1 – Dark Beginnings

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The day began ordinarily for Ichigo Kurosaki, or as ordinary as his life had become after his defeat of Aizen. He leaned back at his desk in the 5th Division's office, trying to find some peace and quiet in his life. That was broken when a book smacked into his face, knocking him backwards out of the chair.

"Damn it, Rukia!" He got up, rubbing his nose, staring furiously at his lieutenant. "What the hell was that for?" Another book headed towards his face, but he dodged it.

"Do your paperwork! You've been slacking off for the last hour!"

"So?" *WHACK* "Ouch! Damn it! STOP! I'll do the stupid paperwork!" Rukia glared at him one last time before sitting back down and working on her own stack. Ichigo sat down and hunched over a piece of work, pretending to be working, when in reality he was wishing the Head Captain had never given him this post. As he fantasized what he would have been doing in the living world right now, he accidently leaned back in his chair again.

*WHACK*

"Shit!" Ichigo yelled as he fell again, "STOP THAT!" Rukia simply started working again. A messenger appeared at their door.

"Kurosaki-taicho! Kuchiki-fukutaicho! I have an important message from Yamamoto-soutaicho!" And, after saying this, he dropped a letter on Rukia's desk and left. Before Rukia even touched the letter, Ichigo had already picked it up.

"Now, I'm the Captain. I get to read it first." Surprisingly Rukia didn't reach for a book, but calmly stood up and read over his shoulder.

Kurosaki-taicho and Kuchiki-fukutaicho

The Bureau of Research and Development has discovered that the magical folk of England are a possible threat to the safety of Soul Society. As such, it is necessary to send you as well as Abarai-fukutaicho to investigate and gauge the potential of this community. We have contacted the Headmaster of the prominent school of this community, who has worked with us in the past, and he assures us that the magical community is ignorant of our existence and of no threat. However, we must still investigate, and he has given us permission to send the three of you to the school posing as guards. He will know of your mission and aid you the best you can. We will expect your report when you have completed it. You are to leave immediately.

"Thank god," Ichigo muttered, "Done with the stupid paperwork." *SMACK* "Agh! Stop!" and the two of them shunpoed off to the Senkai gate.

When they arrived, Renji was already there.

"Late as always." Renji said.

"You do know I'm the commanding officer of this group?" Ichigo said with a smirk, "As such, you will treat me with respect. Lets go." Renji scowled at this but followed them through the gate.

Dumbledore sat in his office, contemplating life. He did not even flinch as the Senkai gate appeared in front of him, and as 3 people slowly walked out, he slowly brought his head down. The gates shut with a crash, and slowly disappeared from sight.

"You are the Shinigami sent for the mission?" He said, his voice sounding wise as ever. Ichigo stepped forward, speaking.

"I am the leader of this mission." Renji snorted, only to be jabbed in the side by Rukia as Ichigo smirked. "I am Ichigo Kurosaki Captain of the 5th division, my lieutenant Rukia Kuchiki, and the inferior Shinigami Renji Abarai." Rukia bowed as she was mentioned, while Renji threw a punch at Ichigo, who dodged.

"Very well," Dumbledore said, "As you know, you are posing as guards. The only things I ask of you are to not disturb the classes here, as well as to protect the students from harm. If you could provide emphasis on the student known as Harry Potter, it would be greatly appreciated. I will introduce you over dinner tonight, as term started 2 days ago. Your quarters are down those stairs," He motioned behind them, "and the 3 doors immediately on your left. Dinner is at 6 o'clock, so please be there."

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Hi! So everyone knows, I am horrible at writing long chapters. For some reason I cannot wrap my mind around it. So, to make up for this deficit, I will be posting as frequently as time allows, hopefully at least once every 2 days.

Next weeks episode will be called… Frightful Tremors, or, Hitsugaya's Headache!