BigOnionbean 
"[@Prometheus labs CEO":](/images/2239373#comment_8727746
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Not necessarily, normally they would all just share the same headspace with each other, playing as mere parts of a mind that operates independent of their own thoughts but drives from their influence. This will not be that case as Sombra or may I say Umbra intends to be the dominant mind in the fusion, controlling not just the conscious of the fusion but the directly the actions of the fusion itself.
Emu War veteran..
Not necessarily, normally they would all just share the same headspace with each other, playing as mere parts of a mind that operates independent of their own thoughts but drives from their influence. This will not be that case as Sombra or may I say Umbra intends to be the dominant mind in the fusion, controlling not just the conscious of the fusion but the directly the actions of the fusion itself.