Alfheim no Kishi Comic
Fairy Kingdom's Knights / Knights of Alfheim / Les Chevaliers d'Alfheim / Yousei-koku no Kishi

Princess Rosely’s life changes when she takes up a sword to fight an evil wizard and the legendary Sword of Light, Lucilys, chooses her as its heiress. Her peaceful days in the castle of Altodias end as she loses the people she loves and is separated from her twin brother, Rolant, heir to Silvan, the Sword of the Moon. Rescued from a cold river by the green-eyed king of the Alf, Rosely grows up as his foster daughter in Alfheim, learning magic and martial arts as she waits to avenge her lost country. She must face the questions surrounding Lucilys, the source of her misfortunes, and the third ancient sword, Soles, the Sword of Sunshine—including who is destined to wield it.