It's not known if Rosanne is an independent small nation, or a dukedom part of an unnamed kingdom. It was annexed to the Valm's Empire after Wallhart conquered it, giving no choice to Virion other surrending or fleeing. He decided to flee, in order to seek an alliance with Ylisse and prevent a more deaths. In the end of the story, after Wallhart's defeat under the Shepherds, is shown that Virion and his wife of choice, returned to Rosanne and to take back the throne. He was branded a coward, but his wife's popularity and efforts to reconstruct the lands won the populace's favour.
Known people from Rosanne
- Virion - The former Duke of Rosanne who has a tendency for wit and puffery.
- Cherche - A vassal of House Virion who thinks her wyvern is adorable.
Rosanne means 'graceful Rose', a composite name of Rose and Anne.