I would like to see a healer that used a giant paper fan. Maybe someone that worked with Paper as mentioned above for talismans and other kinds of empowered origami creations.

A healer that used masks like the Chinese art of Bian Lian would be neat too. The weapon could be an ornate mask worn during combat that swaps quickly with dancing flourishes for each oGCD used.

This might sound odd but a bird cage that was used to store aether and form it into various aetherial animals to do our bidding. It could release birds, butterflies, insects in general really, frogs, snakes, etc with each doing a specific GCD or oGCD before disappearing.

Some items off hand that come to mind I would want to see are an Umbrella, Magnifying Glass and Suit Case for an aether inspector, or a Cape/Flag (imagine sheathing your weapon and getting a different cape for each one).