Slayers Gorgeous(1998)

Slayers Gorgeous is an anime film that plunges sorceress Lina Inverse and her companion Naga into an unexpected battle when the spoiled Princess Marlene invades their peaceful town with a legion of dragons. The conflict stems from Marlene's bitter dispute with her father the king over her allowance, and she's determined to level everything in her path. When Lina's signature Dragon Slave spell mysteriously fails her, she realizes this fight is far more dangerous than it first appears. Alongside Marlene's tetrad of powerful knights, the dragon assault forces Lina to dig deeper than ever before to protect the village and uncover what's really driving this devastating invasion.