It is very difficult to tell.
1. I guess you should disable the 8directions for Otto, not stop it.
2. Check if there are 8directions actions for the etoile ("on touch" etc)
Personally I would not be disabling/enabling the behaviour. I would use a global.variable "switch" that would tell whom to move.
On Touch -->
if switch =1 --> move Otoo
if switch = 0 --> move etoile