In Demon Slayer, if a slayer proves to be efficient, prodigious, or has a relationship with a Hashira, they can become their tsugoku and apprentice, as we saw Rengoku had the desire to make the main trio his tsugokus.
For this, super special events could happen on the map:
-
Spawn of a lower-tier demon and a Hashira. After a tough battle, you would earn more respect with that specific pillar, which could make you their tsugoku, promoting better teachings and the evolution of your technique.
-
Protect the people on the train. A Hashira would be by your side on a moving train that would break apart due to an Oni attack. If you manage to protect the people, you will gain respect from the specific spawned Hashira.
These events could occur rarely on the map, thus allowing players to stay alert. If they are relatively close to the event, the crow will alert them; if they are far away, the crow will take a little longer to notify them.
This system would make it possible to the slayers could evolve their styles, learn new techniques from that breathing.
Just examples of passive/active skills derived from respirations, but evolutions could affect the forms of respirations.
Examples:
-Thunder leg strength training, which would naturally make you faster.
-Sound breathing endurance training, and greater mastery in using bombs with the breathing.
-Kanronji flexibility training, in addition to air proficiency to use forms of the breathing.
-Perhaps the rapid movement technique of flames that Rengoku used against Akaza and to chase after the slasher.
Etc..