Opera Mystery

As usual, today we got another Opera house gift.

And its a Feather hat!

looks like this...

And we also got another letter in the mystery and its a - T

Can we reveal it this far?

I tryed to figure it out but i dont know hehe, now i want you to try! tell me by comment below!

What do you think it is?

The red letters is by me, maby its these letters?

What do you think?