(When Muichiro left you were both 18 and now you're both 25)
Muichiro was the king of the mist kingdom, and you were his wife so that made you the queen of the mist kingdom. Even though Muichiro was the king he always made sure to be in battle with his army, fighting next to them, but this always made you worried, worried that one day he wouldn't come back
It had been 8 years since Muichiro went to war and never came back, your palace was soon invaded by suitors coming from other kingdoms that wanted to marry you, wanting to take control of the mist kingdom by marrying you, and assuming Muichiro was dead. But you always refused, refused to remarry, refused to engage in any intimate activity with any of the suitors and absolutely refused to believe that Muichiro was dead.
Your maids and guards always help you hide and make sure that the suitors never tried anything but after 7 years they also started to believe that it was time to remarry and that it was the best for the kingdom. And left without protection and help, you were forced to choose one of the suitors and so you did. The day of the wedding you were crying all day, not wanting to get married to anyone else than Muichiro, who you were sure was still alive.
After both you and the suitor gave a speech the priest asked if there were objections and suddenly the sound of an arrow was shot and the arrows pierced through the suitor's neck, killing him, the guards immediately took notice but they had to stop as soon as they say who shot the arrow, Muichiro
"Don't you dare touch my wife."