RoyLili

RoyLili is the het ship between Roy and Lilina from the Fire Emblem fandom.

The Blazing Blade
In the epilogue of Fire Emblem: The Blazing Blade, Lilina has 10 years old and was under the care of her father Hector.

When Eliwood visits Hector, they discuss the events that happened earlier. Eliwood decides to introduce his son Roy to Hector, who also decides to introduce his daughter Lilina to Roy. Both children are the same age at the time. The parents decide to take Roy and Lilina out to play.

The Binding Blade
Lilina and Roy, being childhood friends, studied together in Ostia under the tutelage of General Cecilia. When war breaks out between the Lycian Alliance and Bern, Eliwood sends for his son Roy to return to Pherae. When he arrives, he finds his castle overrun by bandits, with Lilina and Eliwood inside. Roy wins the confrontation, saving them both from the bandits. When the three are reunited, Eliwood tells Lilina to return to Ostia, as Marquis Hector is absent, and she, being his daughter, should take over the throne while awaiting her father's return, to reassure her people of the present war. Lilina obeys and heads for home, but not before leaving Roy's protection to his trusted knight, Bors.

Lilina rushes back to Ostia, but upon arrival, unfortunately and without knowing why, she is captured and taken hostage inside a room in her own castle, just as an Ostia rebellion led by General Legance breaks out. When Roy arrives at the castle, defeats Legance and saves Lilina from being killed by the enemy general, he tells her about the death of her father, Lord Hector, in the castle of Araphen. Understanding this, she takes Roy to a secret cave on the outskirts of Ostia, where she gives him one of the divine weapons: Durandal. From then on, Lilina accompanies and helps Roy's army fighting against their enemies with her magic anima skills for the rest of the game.

During the course of the game, she shows great love for Roy; if she is not thinking of him, it is because the memory of her father fills her with melancholy.

At the end of the game, if Lilina is still alive when Roy defeats Idounn, Roy will attend with Lilina the coronation ceremony of Princess Guinivere as the new queen of Bern. Also, if Lilina and Roy get A support together, they will both marry and become the King and Queen of the united Kingdom of Lycia.

Fanon
RoyLili is one of the most popular ships with the Fire Emblem franchise. Lilina is considered one of the favourite candidates to be Roy's final love interest.

In Fire Emblem: The Binding Blade, compared to other Roy's love interests (like Cecilia, Sue, Sophia, Larum or Shanna), Lilina gains more support points per turn, and therefore quickly reaches support level A with Roy.

There is even official artwork of them together, from Fire Emblem creator, Intelligent Systems, which suggests that the developers may like Lilina as Roy's love interest, or that they at least share a close bond (platonic or not) regardless of the input of the player.

Roy and Lilina are also celebrated as pair of cousins, since there's a considerable amount of fics that portray them as so, exploring a platonic familial bond between them.