Tsukasui, but Ryusui accidentally wins his #1 hater's heart by becoming big brother #2 to Mirai.
Ryusui was revived not too long ago, and he finds this sad little girl gathering seashells. He can't accept that! He hates to see ladies shed tears! He must cheer up this little princess!
So he talks to her, hears about her brother being gone to sleep for a long time. He has no idea what transpired at all, but he understands her lost.
Cue Ryusui collecting seashells with her, making bracelets, having tea parties, helping her making friends, playing with all the kids, getting Francois to slip some treats for her.
He unlocks the title of big brother Ryusui because that man has so much big bro energy.
He promises to bring back seashells from their expedition to Treasure Island for Mirai when they leave. And he does. The most beautiful he can find.
Once Tsukasa is revived, he truly doesn't appreciate the return of money and Ryusui's presence. Until Mirai tells him all about big brother Ryusui and everything they did together and how it felt less lonely while she waited for him to wake up thanks to him.
