Is anyone actually using this 'Alfaerie Animals' representation?
As far as I'm aware, not for Ultima itself (even the GC preset lacks it as an option), though some of its offshoots (Rococo, Fugue) and other games using its pieces (Carlos Cetina's Universal Chesses) use its Chameleon, Long Leaper, and Immobiliser quite consistently. Those games use a different image for the Withdrawer though (An ox, whereas the one here is used by David Howe for his Chess on a Longer Board with a few Pieces Added) and don't feature the Coördinator at all
Whether use in other games qualifies the piece set to be used on this page too is another question of course (though one could certainly argue for at least the GC preset to include them as an option)
As far as I'm aware, not for Ultima itself (even the GC preset lacks it as an option), though some of its offshoots (Rococo, Fugue) and other games using its pieces (Carlos Cetina's Universal Chesses) use its Chameleon, Long Leaper, and Immobiliser quite consistently. Those games use a different image for the Withdrawer though (An ox, whereas the one here is used by David Howe for his Chess on a Longer Board with a few Pieces Added) and don't feature the Coördinator at all
Whether use in other games qualifies the piece set to be used on this page too is another question of course (though one could certainly argue for at least the GC preset to include them as an option)