Arkya might be yoen soul

I think so too.. (づ￣ ³￣)づ

That's what I was thinking in the beginning. Since Dream Watchers don't recall their past or how they died, I thought Aryka could've been the one Vince loved in HS. But when Yeon was revealed, I gave up on this theory. Until Yeon's death was revealed, Aryka could still possibly be Yeon's soul. And Xan, the red hair reaper, mentions that Aryka and Vince are similar in age.