At first, I was unsure about playing Fuuma from this canon point. But I think you're doing a great job giving him depth and personality when it'd be so easy for him to just be... kind of flat. I know it was a while ago at this point, but I really loved how in the app you actually acknowledged that, hey, Fuuma's life sucks and yet he still keeps being strong despite it. That totally made me relook at pre-choice!Fuuma in a whole new way.
As for playing, I think you've been great with him so far. I agree with the anon above that you did a great job having him interact with all his cast mates. And non-castmates as well! I look forward to seeing more from him!