Asura is provided when you start the game, and the other machinas can be obtained when the requirements below are fulfilled.
◆ Requirements for machinas
- El Gennaro: Obtain Hero "Duran"
- Janus: Admiral Lv. 15 and Watch Sub Story "Janus"
- Arbalest: Admiral Lv. 25 and Watch Sub Story "Arbalest"
- Arondite: Admiral Lv. 35 and Watch Sub Story "Alondite"
※ Each requirement can be viewed at the Hangar.