"I'll be fine! I've got Max Repels with me. And I've got you, too..."
Lillie is a supporting protagonist and possible love interest to the player character in Pokemon: Sun & Moon. She's also the daughter of the game's main antagonist Lusamine and sister to the rival character Gladion.
The story begins with Lillie rescuing the Pokemon Cosmog (hereafter known as Nebby) from her mother's organization, the Aether Paradise. She was chased down by Lusamine's henchmen, but makes it to the islands of Alola and teams up with the player character.
Amine: As a baby she was held by her father before he disappeared in an Ultra-Worm hole. When she was 6 years old she was carried away by an Ultrabeast when Faba was secretly opening a Ultra-Worm Hole in order to impress Lillie’s busy mother. But Gladion’s future Pokemon save her, but it would make her fear Pokémo. Four years later she gradually overcome her fears by taking care of a Alolan Vulipx named Snowy, help from Ash Ketchum, taking care of Sungelo, and seeing that Gladion’s Pokemon saved her just as it did when she was 4 years old. She attend Alola‘a first Poke Leauge wher she, her brother, classmates, mentors, and family attend. She ended up Top 8 after her brother defeated her. Afterwards she witness her friends fights, her brother vs Ash which resulted in her brothers defeat and Ash’s rise as the firs Alolan Pokemon Leauge Champion which warms her over to the two of them for an epic battle, fought against three Guzzlords, and witness the finale between Ash and Professor Kukui after his public exposure as the Masked Royal! Shortly thereafter her family found a clue to their family patriarch’s whereabouts. After tearful farewells and departing photographs from Roton Dex the family sailed on a cruiser to start their journe, but not before Lillie lou thanked Ash for being a positive influence on her and her family. Ash, whom has been touched by this loudly thanked Lillie and wished her safety. She is last seen having a fun time with her family on one of the cruiser’s tables.
Lille encounters the player shortly after she comes to Alola. When Nebby is attacked by a flock of Spearow, the player bravely steps in and defends it despite not having any Pokemon at the time. Lillie then stays by the player's side during several key moments in the game such as during the island trials and during encounters with staff from Aether Paradise. In these moments she heals the player's pokemon after any battles.
With her mother's corruption and her brother's absence, Lillie sees the player as the only person she can really trust. This culminates in her giving Nebby to the player once Lusamine is defeated, as Lillie has seen that the player treats their pokemon with love and care.
After the Pokemon League, Lillie decides she's going to the Kanto region to become a Pokemon Trainer so that she can eventually battle alongside the player rather than just tag-along.
Lillie meets Hau shortly after meeting the player character. Hau awkwardly tries to flirt with her whenever they meet but is too shy to follow through on them. His interest in Lillie is also shown as he's visibly distressed when she leaves at the end of the game.
Lillie is the second classmate that Ash has meet in the Pokémon the Series Sun and Moon arc. He, his Pokémon’s, and her brother, Gladion helped her overcome her fears of touching Pokémon’s. Lillie’s hints of her romantic feelings to Ash is when she blushes over Ash’s praises of her, shows concern about his safety, smilies and giggles when Ash is showing funny picture, and is awe with his battling skills. At the Sun and Moon arc she loudly express her gratitude to Ash for helping her overcome her fear of touching Pokémons, making new friends, and also thanked him for making her family again. Ash returns this by wishing her and her family safety.