My opinion on Fairy Tail Ships.

Nalu (Redo)

Characters in 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.

Lucy Heartfilia (ルーシィ・ハートフィリア Rūshi Hātofiria) is a mage of the Fairy Tail Guild, wherein she is a member of Team Natsu.  

Synopsis,

During the Macao Arc, Lucy was first introduced as when she was complaining about the fact that the town of Hargeon contained only one Magical shop. She eventually purchased the Celestial Spirit Key of Nikora, all the while trying to charm the store owner into lowering the Key's price. She fumes over the fact that the store owner only gave her a discount of 1,000 jewels, then is intrigued when she hears other girls saying that "Salamander" is in that particular town.

She goes off to see "Salamander". Unfortunately, Lucy became affected by his Charm spell and almost fell for him until a certain pink-haired boy and a blue cat interrupts and yells out "Igneel", which managed to disrupt the charm because the charm forces people to believe they are in love but if the person becomes aware of the spell they break the charm and that allowed Lucy to return to her senses. Lucy thanks the intruders and treats them.

They introduce themselves to each other, while Natsu and Happy explained that they are looking for the dragon Igneel. Lucy incredulously points out that a dragon would not likely be in a populated town, which stuns Natsu and Happy and they agree. While they eat, Lucy starts to talk to them about Mages and Guilds and how she would like to join her dream Guild, Fairy Tail. Lucy tries to take her leave, but Natsu and Happy, who are very grateful for their free meal, try to thank her profusely, much to her embarrassment.

She eventually runs into "Salamander" who persuades her to come to his boat party that night, with the incentive that she might join Fairy Tail through his connections. Natsu, on the other hand, overhears someone saying that "Salamander" was supposedly a member of Fairy Tail. This makes Natsu suspicious. Meanwhile, during the boat party, "Salamander" tries to drug Lucy but she sees through this, much to his surprise. This forces 'Salamander' to reveal that his real name is Bora and he is a slave trader who is attempting to sell Lucy and the other girls on board. He throws away Lucy's Celestial Keys and just as Lucy is about to be branded, Natsu crashes in.

The transportation takes a toll on Natsu but Happy manages to help Lucy escape. Unfortunately, Happy's Magic wears off, prompting both of them to fall down at the sea. Lucy was able to retrieve her Keys and summon Aquarius who washes the boat along with Lucy at the shore. No longer affected by the rocking boat, Natsu retaliates and attacks Bora, revealing that he is the real Salamander of Fairy Tail, much to Lucy's awe.

Natsu manages to defeat Bora and his goons but destroys half the port of Hargeon as well. As the royal army descends into the mess he made, Natsu panics and grabs an indignant Lucy, fleeing the scene. Lucy is at first resisting but is surprised when Natsu offers her a place in Fairy Tail. She happily accepts and is seen running away from the royal army, laughing along with Natsu.

Lucy arrives at Fairy Tail where Natsu immediately starts a brawl. Lucy meets other Fairy Tail members, as well as the Guild master, who encourages them to do what they think is right. She soon gets her Guild mark from Mirajane, and proudly shows it to Natsu only to be slightly ignored by the Dragon Slayer. She was shocked when Natsu said "Luigi" instead of Lucy. She then asks Natsu who is standing right in front of the Request Board, as a newbie, "What's that?".