Helm of Charm Protection

Helm of Charm Protection makes the wearer immune to critical hits (as all helms do), and provides an always on Mind Shield status effect. The description is misleading, even though it explicitly states to stop all forms of emotional manipulation, only those that are stopped by Mind Shield are affected. Fear, panic, and the emotions spell are all unimpeded by this helm.

In-game description
"As its name suggests. The Helm of Charm Protection protects its wearer from any magical attempts at emotional manipulation. As a precaution, some high-profile mercenary groups regularly equip their members with such helmets to ensure that they can perform their prescribed duties without external interference"

How to acquire

 * Sold by the Temple of Lethander in BG2
 * Sold by the priest of tempus who sets up shop in your Fighter Stronghold.
 * There is at least 1 more helm that can be found in BG2