Your helper (Susie) becomes available once you reach level 5.
A helper works in a similar way to your friends.
They help you to progress through the game by allowing you to take and send socks to them as you would with your other friends.
In Open play your helper will give you a set sock that you are in need of to progress out of open play.
The bar underneath the helper in bin friends shows how long it will be until their bin changes.
The bar underneath the helper in the Postbox shows how long it will be until you can send them another.