My opinion on Fairy Tail Ships.

Nali (Redo)

Characters in this ship,

Natsu Dragneel (ナツ・ドラグニル Natsu Doraguniru) is a Mage of the Fairy Tail Guild, wherein he is a member of Team Natsu. He is the younger brother of Zeref Dragneel, having originally died 400 years ago, being subsequently revived as his brother's most powerful Etherious: E.N.D. (ＥＮＤイーエヌディー Ī Enu Dī). Natsu is also among the five Dragon Slayers sent to the future from four hundred years past, having an additional purpose in the assistance of the defeat of Acnologia. 

Lisanna Strauss (リサーナ・ストラウス Risāna Sutorausu) is a Mage of the Fairy Tail Guild, the younger sister of Elfman and Mirajane, and a childhood friend of Natsu Dragneel. 

Synopsis,

Edolas Arc,  In the arrival of Gildarts Clive, Natsu and Happy came and gladly talks with him. Suddenly Gildarts jokes about Natsu's relationship with Lisanna but is shaken when Natsu tells him that she died on a mission with her siblings two years ago, upon Elfman's Take Over fault.

  When the four (Natsu, Wendy, Happy and Carla) visited the Edolas Guild, they got caught by Edolas Lucy, namely, Lucy Ashley subsequently wrestles Natsu. During the torturing process, Lisanna Strauss appears and upon seeing Lucy Ashley bullying whom she thought was Natsu Dragion/Edolas Natsu, she tells Edo Lucy to stop which she then obeys. Lisanna is surprised by Natsu's behavior towards her when he and Happy tearfully cry out her name since they missed Lisanna from Earthland and attempt to hug her before getting kicked by Lucy Ashley. When Natsu begins to explain that he came from Earthland to save their companions, Lisanna is seen hiding behind the bar and eventually running outside. Realizing that he's the Natsu that she knows. Lisanna then begins to cry, confusedly that will she go with them or not. Not wanting to hurt Edolas' Mirajane and Elfman, she makes the difficult decision and decides to stay in Edolas herself.  

During the battle against the Royal Army, Lisanna is seen running out along with all the guild members and fights with a staff, and Natsu fighting the troops with his Earthland friends.However, when the Anima begins to take the living beings with Magic inside away, Natsu was sucked in. Meanwhile, Lisanna begins to glow. She tries to explain, but Mirajane and Elfman of Edolas reveal that they already knew. Elfman said that they already noticed, but just couldn't say it, and apologize. Mirajane then says that she's like their Lisanna, someone who's really kind, and thus she can't let her real siblings cry anymore. As Lisanna tearfully screams out their names, Mirajane asks her to give them their regards.

After returning through the Reverse-Anima, Natsu and the others see that the Guild and town are perfectly fine. The relief feeling has been gone by Pantherlily, whose body has shrunk to accommodate itself to the Earth Land environment, reveals himself, wishing to join Fairy Tail, as it was the Guild that Mystogan was in and that Gajeel had promised that he could join, much to the Iron Dragon Slayer's delight, but that he found someone suspicious hiding in the bushes.

Pulling the rope he's tied her up with, Pantherlily reveals to have captured Lisanna and when everyone sees her, the whole group, especially Natsu, is surprised by her appearance and declares that she's not suspicious. Wondering how Lisanna could be in Earth Land, as those from Edolas have no Magic in their bodies, She then notices Natsu, and immediately runs up to him, her hug ramming him down to the ground, in blushes and tears. Natsu looks very confused and uncomfortable during this. She then hugs Happy and is glad to see Gray and Erza as well. She notices Lucy and Wendy too and deduces they must be the Earth Land versions of their counterparts back in Edolas. Gray then asks if she's Lisanna of Earth Land, to which she replies affirmatively. Everyone is further shocked, and Happy and Natsu happily try to hug her, but Erza stops them, stating that Lisanna died two years ago.