His. Zorish identifies as male.
We get a view of the Yeerkish court and trial system in
Visser, where both Edriss and Esplin do, in fact, speak for themselves in front of the Council of Thirteen and call witnesses. That system would likely appease Zorish, but not Myitt who belongs to a rebellion that operates under a different system. And Andalites have their own version of trial before the Electorate, and humans have their own system as well. See the problem? When you have not only different species from different cultures, but also from different realities, it's difficult to choose which system to use. Better to just duke it out and hope for the best.
.......says the person with the unconscious character.
Good idea, though. Just won't work in this setting, I don't think.