Theo is going to another department of the army, and he might just work under Annette! I don’t think Theo’s role will be demoted in Volume 11. He’s an Eighty-Six after all. I think the author may even try promoting his plot line so that she can explore another department that is helping with the battle. And currently, Annette is still playing a part in the battle and leads her own experiments, but because she isn’t a main character, we still don’t know what’s going on out there, so the author might just use Theo to explore her area.