In Tsubasa, their alternate versions exist in Tokyo, an apocalyptic world continually corroded by acidic rain as fighters of the City Hall faction, who spar with people of the Tower faction (alternate versions of the Dragon of Heaven) for the scarce pure water left.
In combat Yūto wields a sai dagger capable of severing human hands with one swipe, and which bears a powerful whiplash attachment that can smash through concrete.