Percy found Leo in their clearing. Leo was sitting there, his feet in the creek and twirling a leaf between his fingers.

"You alright, Leo?" Leo looked round, startled, but relaxed when he saw who it was. Leo dropped the leaf in the creek and watched it float of with the current. Percy sat next to him, pulling his trainers and socks off. "Find anything?"

"Her name's Louisa Smith. That's all her file had."

"Her file only had her name?" Leo nodded. "How'd you get her file?"

"A friend of a new friend helped me." Leo replied, not mentioning any names. "You find anything?" Percy pulled a face.

"I have a sister. Mom told me all siblings were separated and allowed to meet when they're eighteen."

"What if the siblings were like, uh, all…" Leo waved his hands crazily, pulling a bewildered look. Percy chuckled.

"The babies are injected with life-long drugs that stop all that happening in the future."

"Oh. OK."

"It's weird. I've got a twin sister and I've only known for less than a day." Leo nodded in agreement. "Did they say anything else about her?"

"They said good luck."

"Oh." Percy looked at the water. "We should go and look for her."

"I already have."

"Well, we know her name now. Maybe someone can help us."

Louisa Smith was apparently well known and many wished him luck while others warned him to be careful. Some said she was trouble while others said she was a handful, yet helped authorities bring in some of the more dangerous criminals. Leo and Percy had no idea if they were true and one person waved them off as rumours, but Leo found himself thinking about her more and more. If she did all the stuff the 'rumours' claimed, then that'd be epic, yet really dangerous. If she didn't, what did she do? And what had she done for those rumours to circulate?

One person who knew more about Louisa personally was Percy's penguin, Annabeth.

"She's my roomie and she's really nice. But she doesn't talk at all."

"Why?" Leo asked.

"She hasn't talked for nearly five years." Annabeth replied. "Lou was adopted when she was little and grew really close to her foster mom, Jessica. No-one really knows what happened, but Jessica died five years ago and Lou just stopped talking. She's great though- she's like the defence of our apartment. Some guys tried to get in and she kicked ass big time." Annabeth grinned.

"D'you reckon I can see her?" Annabeth shrugged.

"She's not very sociable."

"I can try." Leo protested. Annabeth smiled. "Besides, she might want to meet Percy."

"Meet Percy?" Annabeth frowned. "Why?"

"Apparently, she's my long lost twin sister."

"Ooh! That'd be interesting. Let's go and see if we can find her."

They walked for half an hour. In that time, Annabeth told them what she could about Louisa. "Her favourite colour is red; she loves hotdogs and is incredibly violent, so beware on that one. She's a bit wary of people at first, but if you're lucky, you can get her trust." Annabeth gasped excitedly. "She's there! Lou! She shouted, running off.

Louisa turned. Annabeth hugged her briefly before holding her at arm's length. "Apparently, you have a twin brother." Louisa looked quizzical. Annabeth pointed and Louisa noticed Percy, who was smiling. Then she noticed Leo and her expression hardened. Leo kept a neutral expression, holding her annoyed gaze.

She started to walk off again, but Annabeth grabbed her arm and pulled Louisa back. "At least meet your brother." She pleaded. Louisa looked Percy up and down before extending her hand. Percy shook it, grinning warmly and in relief.

"Percy Jackson." He said. Louisa nodded and dropped her hand. Percy did the same. "So… we're twins. Who'd you reckon is older?" Louisa rolled her eyes, but there was a small smile on her lips.

"You could ask your mom." Leo suggested. Percy nodded in approval.

"I'll get back to you on that one." Louisa checked her watch. Annabeth noticed.

"Going already?" She sighed. Louisa nodded. "Where do you go?" Louisa tapped her nose, a cocky smirk appearing. She turned and walked away. "Leo, go after her." Annabeth hissed.

"She doesn't like me."

"But she will." Annabeth gave an assuring smile. Leo sighed in defeat.

"Lou! Wait!" Leo ran after her.

"Good luck!" Annabeth called after him. Percy chuckled.