How does the "[...] Character Option Expansion" work?

Hey everybody,

in the shop you can buy "Character Option Expansions", but how can we use them?

Some characters (the types with a cost from 20k to 25k ZP) can be customized with a "Character Option Change"-item. So far so good. But how are we able to use the items for expansion?:

- General Character Option Expansion

- Rare Character Option Expansion

- Special Character Option Expansion

- etc.

I tried to figrued it out, but apparently the options don't exist to use them. The items themself can't be activated and in the character option menu isn't a button for them.

At first i thought it might only work for newer characters, like "Selene", but it doesn't work. So i tried it on older characters like  "Dracona", "Cold Fury", "Hidden Dragon" and even older characters like "Trinity South Beach". I even tried it with "Roxy" beacause there is an option that can be changed at will.

In conclusion I can say that these item are currently bugged or completely useless trash.

Do these  expansion items work only for one special character or am I missing something?