Chinatsu: Both Ninja and Wizard

When Natsus blood related sister gets transported back in time when they were young. Now where is 'back in time? What's Natsu's sister name?

Her name is Chinatsu Dragneel. Chinastu means a thousand summers.

Now, the going 'back in time thing', well, in this timeline, let's just say there are a certain type of ninjas are in the past while a certain type of wizards are the future. And at this time Chinatsu didn't know much about anything since she was 2 years old. 5 years younger than her brother. So kidnapping didn't really faze her until she found herself in a different place. Knowing she wont be able to see her brother, she wailed. Cried til there were no more, and eventually she was found by a ninja.

Ever since she's been living in a village called Konohagakure and became a ninja. Over the time, she has met many people and also made many friends.

Meanwhile in the future, Natsu never forgave himself. After Igneel left, Natsu wasn't in the greatest mood for awhile. For a week after Igneel left, he was in a sour mood. Once, the day Chinatsu had gotten kidnapped, they were camping out and Natsu went to get some food to eat. When he came back she wasn't there...

For years he blamed himself. For years he told himself that it was his fault, his fault that he didn't watch his younger sister. Just because he was in a bad mood. He soon found a guild, Fairy Tail, and told the master of that guild what happened and stayed there ever since. He's his normal self on days that don't involve Chinatsu. Her birthday, he stays in and sulks. The day he lost her, does absolutely nothing for a week.

But then Lucy, a celestial wizard, finds to fix all of that, somehow..