"You can try but he'll never will."
- ―Jayden on Zack
Jayden Rivers is a member of the Black pack introduced in Full Of Surprises. He is the serious twin brother of Zack Rivers and a relative of the Blacks and Atearas.
Biography
Early life
Jayden Rivers was born and grew up in La Push with his family and is the older twin brother of Zack Rivers by ten minutes. He hears about the Quileute legends and unlike the others who never believed it before, Jayden does but he never thought they were actually real. At the age of seventeen, Jayden phase into a wolf before Zack who phase after witnessing his brother’s transformation in surprise. Jayden was startled of the transformation but got used to it in the end and was recruited to join the Black pack along with his brother.
Full Of Surprises
Jayden made his appearance in his wolf form where he met up with the rest of the members of the Black pack and the Uley pack where Jacob Black informs them of Tiffany Stewart being the latest victim of Joham creating a “super race” of hybrids by getting human women pregnant. Knowing that he's harming humans for his own experiments, both packs assist on protecting Tiffany from Joham.
Jayden was seen outside the Cullen house along with Zack, Tom Gardener, Maya Seagal and Kevin Cress standing guard while the rest of the pack minus Jacob assist some of the Cullens on catching Joham’s kids Blake and Christina. However, the Cullens and the pack were ambushed by newborn vampires led by Joham but they destroyed the army and Joham failed to get Lucina Stewart although he vows to have her.
After Joham’s second failed attempt to get Lucina, the Cullens filled the pack in on the plan. Jayden was with Zack, Kevin, Embry Call and Quil Ateara catching Blake who was supposed to be killed by the Cullens. They succeeded on capturing him and brought him over to the Cullens where they have Joham. The Cullens were about to kill Joham until the Volturi arrived to see what was going on. Aro meets Tiffany and Lucina and eagerly asked them to join their coven which was refused by an angered Lucas. After Lucas rant out about the Volturi's failure of their job, the Volturi killed Joham after Blake was already destroyed by Zack and returned to Volterra. According to Edward, Lucas's words impacted them although it'll 'take time for them to admit it,' he said. Everyone soon threw Lucas in the air as a celebration for everything he has done for the coven.
Have A Purpose
To uncover the mystery about the Volturi’s future and Jemma and Raymundo’s idea with the Cullens, Jayden along with Tom, Maya, Zack and Kevin made an area for the Cullens to make a scene when encountering Jemma and Raymundo by using their scent to mask the Cullen's so that they can deceitfully uncover the two's involvement about the Volturi.
Physical appearance
Jayden has the traditional features of a Native American; black hair, light brown eyes, russet skin and is six feet and four inches tall.
Wolf form

Jayden's wolf form.
Jayden’s wolf form is described as having brown black fur with a grey spot.
Personality and traits
Jayden is the serious one of the pack after finding out that the legends of Quileute tribe are true even though he’s always believed in them. By joining the Black pack, Jayden isn’t prejudice of the Cullens like Seth Clearwater is of them thinking them as people than vampires.