Lucero is a pet in The Forgotten Sanctum.
This nervous little stallion was bred for bullfighting but proved unfit for the ring. He keeps close to your side in strange environments and cries out when left alone. Fearful of kith and wilder alike, the only creature he seems to feel safe with is you.
While Lucero is following the party, you have Resistance to Dexterity Afflictions, and the party has reduced recovery time after using Quick Items.