NaLu is a semi-canon ship and one of the most popular ships. It is between Natsu Dragneel and Lucy Heartfilia.

This ship is extremely justified and very likely to happen what with the two having the closest relationship of anyone in the guild and Natsu always managing to land on a certain part of her anatomy.

She and Natsu form a team with Happy that soon gains Gray Fullbuster and Erza,

Scarlett, forming Team Natsu, which Wendy Marvell and Carla are occasional members.

Natsu is responsible for bringing Lucy to Fairy Tail after she buys food for him and Happy and is saved by him before destroying a pier together.

Natsu and Happy often break into Lucy's house and fell asleep one time waiting for her. She once broke into his house but ended up cleaning it.

They both believe in the other, Natsu believing more in Lucy's power than she does in herself, always insisting she has more power than she thinks.

The trust between the two is evident when Lucy jumps from a, probably, 30 story high tower and knows Natsu will catch her.

Happy has mentioned that Natsu cried at the thought of Lucy leaving and cried over Future Lucy when she dies.

He also gets the Sakura Tree for her when she's too sick to see it herself. He digs it up and floats it down the river by her house.

Natsu is very protective of Lucy and is outraged when he hears she's going to be executed in Edolas.

Overall, NaLu is a very possible ship and is my OTP.