“As long as Tatara is defeated, then the spell on Dyute should be broken, but I have no idea what to do. I beg you, please let me go along with you to save her!”
—Luthier in Gaiden.
Luthier (リュート Ryūto, translated Ryuto in the Japanese version and Ryu in some of the fan translation) is a Mage from Fire Emblem Gaiden. His sister is Dyute, who was brainwashed by the necromancer Tatara and forced to help him guard the floodgates between Zofia and Rigel. When Alm enters the Forest Village, Luthier begs for his help and offers his services in return, joining Alm's army. After the war ended, he felt his magic was still too inexperienced and left for a continent beyond the sea.
In Ankoku Ryū to Hikari no Tsurugi, Luthier appears in Khadein, watching the young mage, Merric as he finally mastered the thunder spell. The two proceed to go out for a walk. Merric praises Luthier's powerful magic skills for his mastery over the spells Bolganone and Elfire. Luthier proceeds to admit that he really had no interest in either of the two spells, and actually sought out "the wind magic... Excalibur" as well as "The light magic... Aura" and reminded Merric, that he too, as a fellow mage, should attempt to learn these two uncommon spells. Luthier prepares to head back to his home in Rigel, but before doing so, tells Merric that the prince of Altea has come out of hiding in Talys to defeat the army of Doluna, and further motivated Merric to go seek them out by telling him they may try to meet up with the princess of Akaneia. The two then part ways, Luthier telling Merric they may never see each other again...