Almonis, Alcheilla

Synola is actually Alcheilla, the Queen of the Lance Shelled City, Glendan. She wished to experience the life of an ordinary girl, so she disguises herself as Synola. Kanaris, one of Glendan's 12 Heavens-Blade wielders, serves as her double and performs the role of Queen while she is away.
Although they look very much alike, Synola (Alcheilla) has green eyes, while Kanaris has purple eyes.
The Chrome Shelled Regios artbook shows her given name to be written as Alcheilla.