A/N: Please don't be mad. Plot bunnies and brain worms and Lexi!

This is an AU. Evelyn is James' twin sister. Where as James hates Severus upon their first meeting, Evelyn very much becomes too Severus what Severus is to Lily. This story is going to take place over their 6th year and you'll watch as feelings in the group dynamic grow and change. I hope you guys like this as its my first OC character.

Prologue

James groaned as his sister followed him into the train compartment. There were already for other people in it, including Sirius Black. This was their first year of Hogwarts and already his sister was clinging to him.

"Hey Sirius," he greeted as he sat down next to the familiar boy. His twin took the seat across from him, sitting next to a boy with greasy black hair.

"I'm Lily Evans," a Redhead on the boy's other side said, holding out her hand to shake it.

"Potter, James Potter."

"I'm Severus Snape." The greasy-haired boy stated plainly.

Sirius gestured to the quiet boy next to him, "This is Remus Lupin."

James relaxed at the comfort the compartment had. Until Severus turned to James' sister, "What's your name?"

She lit up at being noticed, James usually the center of attention, "I'm Evelyn! James' twin."

She shook his hand with a stupid grin on her face.

James was growing tired of Evelyn's excited bouncing. He had watched Sirius, Lily, and Remus all be sorted into Gryffindor and various other students into the other houses. Evelyn couldn't shut up about her excitement and the silly things that they already knew.

"Potter, Evelyn."

Finally she took off towards the stool, eager to find out where she would be. Her feet swung and she had a silly little grin as she waited for the hat to be placed on her head.

"Ravenclaw!"

The grin disappeared and fear took over. He realized then that she just watched all of her friends be sorted into one house and she was separated. Mum and dad had always sheltered them and spoiled them and he realized just how much she needed him.

Later as Severus was sorted into Slytherin, James didn't noticed Evelyn watching with a sad face.

Second Year

Evelyn waited in the library for her two friends, already diving into the work in front off her. She actually enjoyed Ravenclaw and found she really belonged.

"Hey Evie," Lily greeted as she sat down.

Evelyn smiled. She loved the nickname. It made her feel special, like she belonged.

Severus sat across the girls without saying a word.

"Hey Sev," Evelyn greeted with a grin on her face. "How are you guys today?"

"Fine," Severus grumbled.

"He had another run in with James," Lily answered for him.

Stupid James was ruining everything. "I'm sorry, I'm tried to talk to him about it. But he's decided there's this rivalry with you guys."

"What are you doing with him," James interrupted.

Evelyn glowered before turning to face her brother.

"Severus and Lily are my best friends. We're studying. Now go away."

"But it's pathetic little Snivellus."

"Go away, James."

"Whatever," James said turning to his friends, "come on, let's go start looking into what we came here for."

The boys disappeared, and Evelyn noticed that Remus was missing. Something fishy was up.

"Evie, are you going to sit back down?" Lily asked curiously.

Evelyn turned to face her friends. "Yeah, just give me a minute. I think my brother is up to something."

She followed her brother and his friends into a corner of the library.

"What are you guys looking at," she asked as she walked over and peered over their shoulders. James tried to cover it, but she had already seen what the pages he'd. "You can't learn to be animagi! Not legally!"

"Shut it, sis."

"Why are you trying to be animagi?"

"It's none of your damn business." James glared and got up.

"Fine, then teach me too."

"No way, why on earth should we do that?"

"Because if you don't, I'll tell professor McGonagall."

"You wouldn't."

"Try me."

Third Year

As Sev worked with her in potions, Evelyn realized that she didn't just like him as a friend. She wanted to be more than friends. But she had also noticed how he watched Lily. It wasn't fair, because she knew that James was starting to like Lily too. No one stared at her like that.

But still, she let herself get lost in the brewing. Occasionally she thought about trying to make their hands touch, even briefly, but she didn't dare. No wonder she hadn't been in Gryffindor. Still, she realized how she felt.

"Hey Sev, I'm really sorry that my brother is always prick."

He gave her a half smile, the kind that gave her butterflies, "It's not your fault. He's his own person and makes his own decisions."

"Still, it sucks to see him treating you that way."

"Well thank you."

And just like that, they returned to the potion at hand.

Fourth Year

James finally noticed the way his sister looked at Severus as they boarded the train. He saw the glimmer and the shine, the way her face lit up whenever she saw him, it was disgusting. Severus would only hurt her in the end. He saw Lily and Evelyn meet up in their usual compartment, one he wished he had been privy to just to be with Lily, and went straight to block Severus' path.

"I'm saying this for the last time, Snivellus," James threatened, "Stay the bloody hell away from those girls. Especially my sister."

"Are you seriously that jealous of me spending time with your sister? She's my friend."

"I don't want you to be friends with her. I never have. Back off."

Severus just pushed passed James, joining Lily and Evelyn in the compartment.

Fifth Year

"I don't need help from a filthy mudblood like you!"

Evelyn watched the scene unfold in front of her. Her heart broke knowing that she would be torn in the middle between Lily and Severus.

Lily was wounded immediately and took off in tears. Evelyn was torn as to who to comfort. Instead, she turned her wand on her brother.

"James, you will leave Severus alone."

James look betrayed, seeing the contempt in his twin's eyes. He still left Severus in the air. "Furnunculus."

She hit him where it hurt, in his pride, as pimples popped up all over his face. James dropped Severus and took of running. Evelyn turned to Severus and went to help him.

"Go away, I don't need your help," Severus yelled. "He's your stupid brother."

Evelyn felt her heart sink, but she wouldn't give up. "Sev, let me help."

Instead he was mumbling to himself, "I need to talk to Lily. I need to apologize to her."

Evelyn watched Severus take off, her heart gone with him.

"I can't believe my own sister turned against!" James cried after Remus cast the counter-curse to remove the pimples.

"James, we've all noticed it since last year, she's obviously got a thing for him."

"Shut it, Remus! For all we knew, we were just imagining it."

"Hey, James, this isn't Remus' fault," Sirius scolded. Then he gestured for Remus and Peter to leave them alone for a moment, and the boys did so gladly.

"Listen mate, I have to tell you something that's been on my mind," Sirius started once they were alone.

"What?" James snapped, still in a foul mood.

"I-I like Evelyn. I'd like to ask her out."

"What are you talking about?"

"Evelyn. She's really pretty. And honestly, we know how I am with the ladies. If she's focusing on me, she won't be focusing on Snivellus."

James ran his hand through his hair. This day was just too crazy.

"James, just think on it. Please."