Wano has been heavily Luffy and Zoro focused and they both saved little girls. Otama has played her role with the Smiles and helping out the alliance. Otoko role might be more of emotional one when we find out who she really is. Oda just randomly brought her to the festival. We know the Tengu can fight and also comment on when Zoro changes his Sword black, but whats the purposr on Otoko. The vivrecard tells us Yasuie isn't her real father. Maybe she a kurozumi or something. I also expect Otama to be special is some kind of way too.