In "Mirror Gem", Pearl holds onto Lapis' mirror before handing it to Steven.
In "Mirror Gem", Lapis says, "You three knew I was in there," revealing that Lapis and the Crystal Gems have history.
In "Mirror Gem", Pearl is eager to tell Steven about Lapis' mirror.
In "Mirror Gem", after Lapis first attacks, Pearl tells Steven to run, showing that she recognizes Lapis as powerful.
In "Ocean Gem", Pearl seems happy to find out Lapis is returning to Homeworld.
In "The Message", Lapis warns the Crystal Gems of Peridot and Jasper bound to come. Pearl takes her advice seriously and creates a machine to wipe out the robotnoids.
In "Chille Tid",when Steven dreams of Lapis, pearl is intrigued.
In "Gem Harvest" Lapis offers a piece of cake Pearl, of which the same graces Saying "Thank you, Lapis".
Most of the time the two appear in an episode together, they always appear side by side.
Lapis and Pearl are very similar stylistically. They both seem to think out what they do, are more of a graceful fighters, and both are great fighters. Also, pearls are made underwater, and Lapis has water manipulation powers.