Strictly speaking of the names Bob's proposed for the Bt[WzB], only Disciple is not also given to a piece in M&B; the Apostle is a (cubic) qB (moving in rings of 6 steps like the hex Finch whose dual it is) and the Evangelist is another cubic piece combining Picket (cf. Tamerlane) and Eunuch (2 steps nonstandard‐diagonally, i.e. unicornwise).
Only the Apostle has actually seen use though, and it could be argued that unlike the Metropolitan (a name I was surprised to see again tbh) whose move is available on the usual board, these are less important anyway, being 3D‐specific. And Evangelist certainly suits this piece well
Strictly speaking of the names Bob's proposed for the Bt[WzB], only Disciple is not also given to a piece in M&B; the Apostle is a (cubic) qB (moving in rings of 6 steps like the hex Finch whose dual it is) and the Evangelist is another cubic piece combining Picket (cf. Tamerlane) and Eunuch (2 steps nonstandard‐diagonally, i.e. unicornwise).
Only the Apostle has actually seen use though, and it could be argued that unlike the Metropolitan (a name I was surprised to see again tbh) whose move is available on the usual board, these are less important anyway, being 3D‐specific. And Evangelist certainly suits this piece well