Disclaimer - All I own in this Fanfiction is Grace Todd. Any children and the storylines. Everything else belongs to CBS.

A/N - This idea came to me while rewatching the whole NCIS series. In this, Kate has a 26 year old sister. When Kate is killed, Grace arrives. She and Tony get close and start a relationship. Keeping it quiet from everyone when she joins the NCIS team. Ziva will too. I'm going to have two females on the MCRT. Also, Tony and Ziva won't be happening. This is purely Tony x OC.

The face claim I would use for Grace Todd is Amber Jepson. She's a UK influencer.

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X-X-X

Grace arrived outside of the NCIS building. She felt a tear slip down her cheek as she thought of her older sister who was now dead at the hands of a suspected terrorist Ari Haswari.

Grace felt betrayal. She knew that she had been working to become an NCIS agent. She wanted to be like Kate. Grace had always looked up to Kate and it broke Grace knowing that she couldn't see her sister again.

X-X-X

Gibbs looked up as the security brought a young woman over. Gibbs recognised her as Grace Todd. Kate's little sister.

Gibbs stood up. He had seen Grace at the funeral. But she didn't stick around long enough for them to get talking. "Hello Grace."

"Agent Gibbs. My sister talked about you. She said you were a harsh sod at times," Grace said as she looked at him.

Gibbs smirked slightly. He could see the resemblances between Grace and Kate. They both had the same eyes. "Your sister is missed around here."

Grace smiled slightly and nodded. She sighed. "Can I be honest?" She asked. At Gibbs' nod, she continued. "I hated NCIS at first. Because I thought she would be safe working here. But now... seeing you all at her funeral, I guess you're all just as broken as I was."

"Losing Kate broke us all."

Grace sighed and looked at him. "Kate inspired me to become an NCIS agent. I passed what I needed to."

Gibbs thought for a moment. He walked off leaving Grace on her own.

-x-x-x

Tony came back up from seeing Abbey. He looked up to see a woman standing there. He remembered her as Grace. Kate's sister. He smiled. "To what does NCIS owe this pleasure?" He asked.

Grace looked at him. "You're Tony yeah? I'm Grace. Kate's sister. I was visiting agent Gibbs. But he ran off upstairs."

Tony looked up towards Jen's office. Tony remembered how Kate mentioned her sister had been in training to become an NCIS agent. "I think I know what he's up to," he said. He looked over at Grace. "How are you holding up?"

Grace shrugged. "I miss her. I have Rachel and the boys. But I miss Kate more than anything."

-x-x-x

Gibbs looked at Jen. "We have a spot on the team. I want her," he said as he sat down.

"But don't you think having Grace Todd on the team would be too fresh in your team's mind? They lost Kate and now you want to replace her with her sister," Jen told him.

Gibbs rolled his eyes. He knew that Grace would be a good fit for the team. He wanted her. "It's her or no one. Me, DiNozzo and McGee will work as normal."

"What about Ziva?"

Gibbs rolled his eyes. "Grace Todd. Should she refuse, then I can accept David. That's the way it is Jen. No exceptions," he said as he walked out the office.

Jen looked at the door as Gibbs left. She knew that Ziva was a friend of hers. But she also knew about how Grace would make them feel like Kate was close by. She had an idea. She was going to have two women on the team.

Grace walked down to her car. She felt someone behind her. She turned to see Gibbs. "Hi Agent Gibbs."

"Abby. She wants to see you. She said she wanted to show you something."

Grace sighed. "I'm sorry Agent Gibbs. But seeing you all is too hard. I lost my sister and the last people she was with were you and your team. It's nothing personal at all... I'm just... in heartbroken," she said as she went to get into her car.

"There's actually a reason I stopped you, Grace. You after a job?" He asked.

Grace was shocked. She looked at him. "Are you offering me a job? My sister's job?" She asked as she leant against her car.

Gibbs nodded. "Kate would want it. McGee and DiNozzo would want it too. We all want you there," he said.

Grace didn't know. She didn't know if she could do that. Replace her sister. She sighed. "Can I think about it?" She asked.

Gibbs shrugged. "No. I filled in the application. All you gotta do is sign it. Director approved it," he told her.

Grace looked at Gibbs. She saw him holding out a pen. She took it from him and signed the form.

She handed it to Gibbs who had a smirk on his face. "I knew you'd sign it. Just like Kate," he said.

Grace sighed. "I owe it to Kate. She looked after me when no one else did. I...I got pregnant at the age of sixteen. She took me to a doctor. Helped me take sort it. Looked after her," she admitted. She hadn't ever told anyone about her past.

X-X-X

Grace walked back into the building with Gibbs. Abby walked over and hugged her. "Welcome to the team!"

Grace smiled slightly. "Thanks. I think."

Abby smiled and walked over to Tony. He was looking at Grace. Grace looked back at him and smiled.

Grace had no idea how joining NCIS was going to change her life. And it wouldn't be all good.