I'm thinking SE should offer 3 "Bundles" for subscription"

Bundle #1: $5.99 = One(1) Character & One(1) Retainer.

Bundle #2: $9.99 = Two(2) Characters & Two (2) Retainers. *

Bundle #3: $14.99 = Four(4) Characters & Four(4) Retainers *

* Retainers will be accessible by multiple characters if created on the same world server.
Example: Two(2) Characters created on the same server can share two(2) Retainers.

I don't know if the Retainer part is doable but thought I would throw it out there.