Both don't really have a purpose as far as I remember. I know Quinn thinks Valor is her dead brother reincarnated but like what's she doing? They just sneak behind enemy lines and spy or assassinate? She's just Katarina but for Demacia. And what's Talon doing? Just walking around being a nihilist? They're both boring and both need some actual purpose in their story. Look at the best stories in LoL.
trying to lead a revolution for the mages against Demacia after being used and imprisoned.
is stuck in the middle of it trying to find a balance to this, because she agrees with Sylas but doesn't believe the solution is to kill.
are involved in a comic currently that talks about Zed's backstory and how he's trying to get Shen to help him. All the while we get to see Jhin in action.
is trying to improve Noxus while dealing with the Ionians, Demacians, and The Black Rose. He's using the power of a demon to help him accomplish this but also his own tactical knowledge and intellect to get the job done.
What's Quinn/Talon doing?
flying around killing people
jumping around killing people
Axamuk Var-Choi Kohari Icath’or had a longer backstory and history than Quinn or Talon