The Fandom Post is reporting that Pluto TV is now streaming the Allison & Lillia anime. All 26 episodes are available with the Japanese audio and English subtitles.
Originally airing in 2008, the series was directed by Masayoshi Nishida based on the series composition by Touko Machida. Shinji Seya worked on the character designs and served as the chief animation director with Madhouse handling the animation production with Tezuka Productions.
The story of Allison & Lillia is described as:
Set in a continent divided into two commonwealths that have been engaged in war for hundreds of years, Allison and Will go on a mission to search for “the treasure that will put an end to the war.” Their hope is inherited to their daughter Lillia, who strives to thaw the torn nations into a united country. This anime encourages young generations to believe in a world without hatred or war regardless of nationality and beliefs.
Source: The Fandom Post