Movario is a mage, scholar and treasure hunter found in the Dorgesh-Kaan South Dungeon after Temple of Ikov is completed.
A Pendant of lucien can be acquired by pickpocketing him; no experience is gained from doing so. He is located in the Dorgesh-Kaan South Caves Agility Dungeon which requires 70 Agility in order to enter and he and his bodyguard Darve will only appear if Temple of Ikov is completed. Pickpocketing Movario is a requirement for the Elite Lumbridge & Draynor Diary. The diary task will be completed regardless of whether you already own the Pendant of Lucien or not, as you can still successfully check the contents of his pockets.
In order to reach him, you will need a mith grapple with any crossbow, as well as 70 Ranged and 70 Strength. At the start of the agility course, grapple across the pylon and he is on the first island along with his bodyguard, Darve.
There are additional dialogue options for wearing the pendant of lucien and claiming "to be one of you guys", and with the ring of charos allowing the player to earn their trust and get more details to their plans.
A successful pickpocket attempt will gain the following loot: