HTTYD The Kunoichi's Way

Genderbent Hiccup and Astrid. After her battle with the red death Hicca exploring takes her to Japan where she encounters a ninja clan that takes her in. Speding the next six years in training she becomes and powerfully skilled ninja and returns home in Berk's hour of need. Using her new skills she shows them she as tough as any viking. DIclaimer: Do not own HTTYD