The Bear Companion is one of the Ranger Animal Companions in Pillars of Eternity.
You choose your Animal Companion during Character Creation
Description
Bear companions have unusually high Damage Reduction, giving them superior protection from all forms of damage
All rangers form a strong spiritual connection with a single creature, their Animal Companion. This connection allows rangers and their companions to coordinate attacks and efficiently take down prey. In most situations, the companion runs interference while the ranger attacks at range.
Despite these advantages, there are risks to the relationship. Rangers share a literal life bond with their animal companions. When one is wounded, the other suffers equally. This also means that when one falls unconscious and dies, so does the other.