Synopsis: Set on an alternative timeline after Episode 6 Volume 3.
After Pyrrha accepts to become the next Fall Maiden and willing to accept the risks involved, however as predicted there is complications. After receiving the Fall Maiden's power, her mind turns into a fight between Pyrrha's mind and soul against the one who tried to steal the Fall Maiden's power, which is Cinder Fall whose physical body is destroyed as the transfer process began. This leaves the troubled Pyrrha to escape and seeking refuge away from the four kingdoms.
After learning on Pyrrha's disappearance and desperate escape, Team JNPR's team leader Jaune Arc asks for help from his teammates, Team RWBY and Sun and Neptune from Team SSSN, in help finding Pyrrha and to bring her home. However unknown to them, Ozpin, Goodwitch, Qrow and Ironwood have authorized to send out the Guardians, a secret special program to create genetically enhanced supersoldiers utilising special military suits of armour into finding Pyrrha, it wasn't after the Guardians are sent out, they learn of the three teams looking for Pyrrha.
Soon it's a desperate race to find Pyrrha Nikos, and to save Pyrrha before she makes a turn for the worse.
Inspired by Halo 5 Guardians and the Halo Universe for Fireteam Guardians
RWBY is owned by Rooster Teeth Productions
Halo 5 Guardians is owned by 343 Industries