He wonders if his double would bother. Knowing what he does of himself, he suspects that it won't have the desire to play hide and seek for very long...if it even decides to participate in the first place.

Disappointingly - or perhaps thankfully? - Emet-Selch is correct: his little doll double is hiding behind one of the branches when Zidane makes it up there. It does make a token attempt to run away but not for very long. Upon being caught, it seems to sigh and go limp, as if resigning itself to capture.