Despite being silent, Y/n was pretty good friends with Rengoku. Being the shadow to his flame and watching his back during battles. Even outside they were on good terms, always listening to the loud flame pillar, offering more food, and just more accepting of Rengoku. It was a friendship the both of them liked. Now that it’s learned that Y/n doesn’t speak Japanese and the reason why she was quiet all the time and needed exaggerated body language to understand, she gets a teacher from the corps and slowly starts to learn Japanese. Now with Y/n slowly opening up more to Remgoku and the ‘real’ her coming up as the language barrier slowly breaks, Rengoku finds himself falling hard for her. Too hard actually. He suddenly wants to do things for her, protect her, show off how much of a good 𝙷̶𝚞̶𝚜̶𝚋̶𝚊̶𝚗̶𝚍̶ suitor he would be, to learn Y/n’s culture before coming to Japan. This is going to be a long trip for the both of them