Hajime Kanzaka was originally going to make Naga appear in "The Battle of Saillune" (volume 4 of the main novel series) but had a trouble to implement this idea properly. This led him to create the character of Amelia. Kanzaka said Naga would not appear in the main series due to Amelia being there, but the two actually meet in "Slayers VS Orphen", a novel and CD drama crossover of "Slayers" and "Sorcerous Stabber Orphen", where the masked Naga appears incognito and keeps her identity secret to Amelia.