It appears as though she is playing an Alto Trombone.

I get it, Tron Bonne playing the Trombone.

Canti said:
I get it, Tron Bonne playing the Trombone.

...I just rofl'd for like a minute. Should I add the "pun" tag?

For people into classic music, and who want to know what bolero stands for, search for Bolero de Ravel, although, not all versions have trombone solos, those bastards...

Somehow thinking about brass instruments reminded me of the Fokkerwolf's theme music (It wasn't a trombone, but the trumpets there are brass instruments)

Ok, what is this bolero tag for? I am familiar with boleros, but I fail to see anything here that would indicate there is a bolero anywhere involved in this picture. Is that what the moon-runes say?

A bolero is also a short jacket worn mostly by females.