Just a quick note to say, some of the characters are going to be OOC. The main one is going to be the Joker. Most of the others I'm going to try to keep as in character as possible, but for this story Joker is going to be much more tame to make this story believable.

She grinned as she sat on top of the building, kicking her legs back and forth off the edge. She was having a pretty good night. She looked down to see a twenty-five floor drop and her adorable new combat shoes. Her Papa had gotten them made for her! She rarely wore any other shoes lately. They were a deep purple; the laces and soles were a bright green. They were her Papa's colors and she loved them very much. She looked across the road to look at the brightly lit up museum. It really was a good night. A gleam went across her eyes briefly and her smile grew. Oh! Her night was going to get even better, she was going to make a new friend.

She sat there for another two minutes, humming happily, before she heard a pair of shoes land on the roof behind her. She leaned her head back and looked at the arrival. She smiled at the upside-down boy in costume.

"Hi!" she said cheerfully.

Robin looked at the small girl in concern and confusion. She was way too young to be out at this time of night, especially in Gotham. He would never admit it to anyone, Batman in particular, but him being nine was too young to be out. He had training though. She had to be at least a couple years younger than himself. Her outfit was really odd as well. From what he could see of her she was wearing all purple, green, and black. Her shirt was an all-black long-sleeved shirt. Which wasn't quite enough as it was pretty cold out. There were small diamonds alternating between green and purple running down the sleeves. A smiley face with X's for eyes was decorated on the front. Her bottom was a green pleated skirt that was covered in a diamond pattern. She wore thick purple leggings. He couldn't see her shoes as her feet were hanging off the edge of the building which was a bit concerning. The only thing that didn't have him running to pull her back was that she looked like she had no intentions to throw herself over the edge. Her hair was pure black and cut in a choppy bob around her ears. Her eyes were a piercing blue, almost the same as his own. The top part of her face had paint smeared on it, mainly around her eyes. Around her right eye was purple and round her left was green. I didn't disguise her identity at all so it must have been for decoration. He had no idea what she was doing up here, dressed like she was. She had to be only six.

"Uh, hi… what are you doing up here?" he asked with a forced cheerful tone.

She grinned at him before straightening back up, looking at the museum once again, "I'm just waiting for the show to begin."

"Show?" Robin asked taking a few cautious steps forward.

The girl nodded, "Yup. Auntie should be starting anytime now."

Robin put the information away before saying, "So my name's Robin. What's yours?" Robin asked, taking another step forward. He really wanted to get her away from the edge she was sitting on.

"You can call me Domino. You're new to Gotham, aren't you?"

Robin gave a slight shrug, "A bit, yeah. You can tell? I do plan on staying for a while though."

She jumped to her feet with a giggle, teetering on the edge of the building and giving Robin a slight heart attack, "Well most people in costume in Gotham already know who I am. I also know all the costumed people in Gotham, plus some outside of the city."

Robin frowned slightly, was she a hero's kid or something? He thought Batman was the only hero residing in Gotham though. "It seems like you've been around a while, how old are you?"

She put her hands behind her back and started walking along the ledge, "I'm six, turning seven in a couple months. Papa's planning a big party and I can't wait!" she smirked at him "You should totally come. We'll be great friends I can tell. You'll have to ask Batsy if you can come."

Robin's eyes went wide, he thought she said he didn't know who he was? Then his mind broke a bit. She called Batman… Batsy? "But, I thought…"

She gave him a small giggle, "I hear a lot more than most people do. I've heard rumors that the bit bad Bat took a colorful little birdy under his wing. I have lots and lots of aunts and uncles that have their hands in less than legal activities. That's not even counting my parents. I even get to help sometimes, which is really fun. Like right now, I make a really good distraction."

Almost like she had planned it the alarms started blazing within the museum. Startling Robin who looked across the street quickly.

Domino let out a long giggle as she plopped back down on the edge of the building, "Have fun Robbie." She sang out.

Robin shook his head and dashed off towards the museum, where apparently there was a heist going down. He looked back once to see Domino smiling and waving at him.