As it happens, two of the options I would've given over Champion are Cardinal and Camel.
I have avoided using Cardinal or Chancellor for C, because the Cardinal is also known as an Archbishop, Princess, Paladin, and other names, and the Chancellor is also known as Marshall, Empress, and other names. I was initially using the Alfaerie Camel, but in looking over your pieces, I decided I liked your Champion better than the Alfaerie Champion.
And since I'm mentioning it, where you put the Fortress I would've suggested something more whimsical or offbeat:
I was going for something more suggestive of a Chess variant piece when seen out of context. A doubled-up Rook is one of those obvious designs that you, Jean-Louis Cazaux, and Musketeer Chess have all used.
I have avoided using Cardinal or Chancellor for C, because the Cardinal is also known as an Archbishop, Princess, Paladin, and other names, and the Chancellor is also known as Marshall, Empress, and other names. I was initially using the Alfaerie Camel, but in looking over your pieces, I decided I liked your Champion better than the Alfaerie Champion.
I was going for something more suggestive of a Chess variant piece when seen out of context. A doubled-up Rook is one of those obvious designs that you, Jean-Louis Cazaux, and Musketeer Chess have all used.