I think "subset" would seem the most natural to me.
After sleeping on it, I woke up feeling that subset would work.
I would also personally place the Silver General and company to be in this group rather than Chimera.
With respect to the pieces in both Shogi and Chess, these are both subsets of the King. However, when I adapted these pieces for Hex Shogi, I conceived of the Gold General as moving like a Wazir or forward as a Ferz and of the Silver General as moving like a Ferz or forward as a Wazir. These are accurate descriptions, which may both be regarded as Chimeras of the Wazir and Ferz. But it is also true that the Hex Shogi versions are still subsets of the Hex Shogi King.
If we're to put these into a Subset category, then this would work best if the Man were put into the Simple Leaper category rather than the Leaper Compound category. Is that something you would be comfortable with?
After sleeping on it, I woke up feeling that subset would work.
With respect to the pieces in both Shogi and Chess, these are both subsets of the King. However, when I adapted these pieces for Hex Shogi, I conceived of the Gold General as moving like a Wazir or forward as a Ferz and of the Silver General as moving like a Ferz or forward as a Wazir. These are accurate descriptions, which may both be regarded as Chimeras of the Wazir and Ferz. But it is also true that the Hex Shogi versions are still subsets of the Hex Shogi King.
If we're to put these into a Subset category, then this would work best if the Man were put into the Simple Leaper category rather than the Leaper Compound category. Is that something you would be comfortable with?