BLUE DRAGON: THE SEVEN DRAGONS OF THE HEAVENS

After the events of the Blue Dragon series, Shu and Bouquet join a resistance group to fight General Rogi's army of invasion.They encounter a mysterious child , Noi, who has the power to revive Shu's shadow counter-part Blue Dragon, and save her from the pursuit of a red dragon. Now Shu and his company have to set foot once again on a journey to discover the purpose of the dragons, undergo their tests and stop the chains of events which threatens the fate of humanity. (Source: Anime News Network) — Description from AniList community (anilist.co).