A long, long time ago, before Ed even attempted to try alchemy, before Alphonse was in a suit of armor.

Let us turn back the clock, back to when Ed was 2, Al was 1, and Winry had just been born.

Baby Winry was mostly quiet. She didn’t cry much, and she very much liked 1-year-old Edward Elric.

One day, Winry was in the same room as Ed and a toolbox. Don’t ask me why these two were alone; I guess Ed’s mom went to get something.

From the crib, Winry reached to the nearby toolbox, and took out a wrench.

“Whatcha got dere Winy?” asked toddler Ed. (“What do you have there Winry?” Is the best translation I can provide for chibi-ish.)

Winry had the wrench in her hand, and, hit Ed on the head with it.

He got a big bump, and he started crying waterfalls.

Winry giggled at his reaction, and hit him again.

Soon, the hitting with a wrench became almost second nature to her, and that night she slept with it.

...She still does. From that one mistake of leaving a toolbox in the room, sparked Winry’s love of machines and wrenches. And, well, Ed goes far away when he’s not getting his automail fixed and she has a wrench in her hand.

Moral of this story: Never leave chibis, babies, or open toolboxes in the same room unguarded, you might start someone’s habit.

THE END!