The Hayabusa clan (led by Hayabusa himself) are a group of Spartans who believe that The Great Journey is real. They do not join sides with the Loyalists because when they arrive at their 'paradise' they want to be on top and not be ruled by The Prophets. They also fight against the UNSC, wanting to destroy them before they can destory the 'Gateway to freedom'. Hayabusa Clan Members have several ranks. Hayabusa recruits and apprentices both have the same appearance.
But the apprentices have stronger shields and are able to weild more powerful weaponry and equipment, yet recruits are more common.
Soldiers can drive vehicles.
They also weild Rocket Launchers and Battle Rifles simaltaniously.
Warriors weild Rocket Launchers more commonly and the only other weapon they are ever seen with is the Shotgun.
Hayabusa Acolytes are quick, have very strong shields, and can kill you in one to two hits with either the Hayabusa Katana or Rocket Launcher, (the only two weapons they weild.) but luckily they are only encountered twice in "The Great Journey 3: Eye of the Forerunner", but when you encounter them, make sure you have a Katana, and a Rocket Launcher, and if possible a Fuel Rod Beam at your disposal.