I wish CP had a sixth planeteer. Someone from Australia.
He/she can use the power of thunder.
If the series went into a reboot, he'll be someone who was manipulated by Zarm. He would start off assisting the eco-villains, until Zarm's appearance, they learn he's been influenced by his evil. Eventually, they break free of it
However, the new member may have gotten his ring when getting the five's rings back, but he doesn't join them officially due to the sins he committed and by Zarm's evil. He goes solo but comes to their aid if needed. His only home is the church.
He and Gi would form a loving relationship with each other.