Is Terroch Arkan immune to Panic... I think that would be really neat thematically :)
This was what I immediately thought when I understood your question. It makes thematic sense that continuous exposure to a giga-core (along with zoider psychology) might have left Arkan incapable of fear or panic.
But on the other hand, any ability that "turns off" a certain mechanic can be really frustrating. Imagine running Chogoking and playing against some new robot that is immune to fire.