In the BattleTech novel The Sword and the Dagger, it can be exposed that Hanse Davion, the First Prince of the Federated Suns, has been replaced with an impostor since the impostor can not pilot Hanse's private Battlemaster, considering that the neurohelmet a mechwarrior wears to give their mech harmony has to be thoroughly calibrated to the mechwarrior's brainwave pattern.