Ricket

Ricket is a goblin located at K3 in The Storm Peaks. She later appears in Deepholm, Mount Hyjal, and the Molten Front.

Deepholm
In Deepholm, Ricket appears in the Crumbling Depths where she gives a daily quest after the zone's main quest chain. D'lom the Collector trades the gold he gets from adventurers for the crystals she gathers. Randomly generated as a quest giver each day, she will not always be available. Notably, the bombs provided for her quests creates an explosion which to many players is the only way to reach the cave that Jadefang resides in.

Molten Front
At the Molten Front, Ricket has teamed up with Damek Bloombeard to help the Guardians of Hyjal to fight against Ragnaros. Prior to that she'll make a brief appearance in Mount Hyjal upon completing Additional Armaments, which'll unlock her as a quest giver in the Molten Front. In the Molten Front she is one of many NPCs which gives daily quests that reward Mark of the World Tree. She will appear on different locations and give different dailies depending on her location. She will only give one daily quest each day.

Apparently, if she doesn't give a daily at her location at Malfurion's Breach, it means she'll offer one for the Furnace or the Forlorn Spire instead. To unlock these locations, the player will have to complete Into the Fire and The Forlorn Spire (quest) (it's only possible to complete one of them each day).

Warlords of Draenor
Ricket appears briefly during the construction of Beastwatch, entering with Durotan's group, but does not appear in the outpost after this.

Legion
Engineers visit her in K3 during a search for the creator of the Blingtron.

Battle for Azeroth
Ricket appears at Rustbolt next to Rocket-Chief Fuselage.

Quests

 * Expression of Gratitude
 * Reclaimed Rations
 * Ample Inspiration
 * Opening the Backdoor
 * Know No Fear
 * When All Else Fails


 * Slightly Unstable
 * A Delicate Touch
 * Demolitionist Extraordinaire
 * Overstock
 * Bitter Departure


 * Underground Economy
 * A Bitter Pill or Living Obsidium (Malfurion's Breach)
 * Bye Bye Burdy (Forlorn Spire)
 * The Bigger They Are (quest) (Furnace)

Quotes
Hello, peach - good to have your company!
 * K3

My, it sure is hot down here. I didn't even need to bring my own forge.
 * Molten Front


 * Rustbolt
 * Gossip
 * Finally, gnomes I can respect! These mechagnomes can make somthin' outta nothin' in 10 seconds flat... And look good doin' it!
 * 
 * I think I'm gonna like it here.

say
 * Dalaran

Speculation
When Ricket worked with Uraka Wildthunder in Zuldazar on an Experimental Warboat, she put a Bilgewater Cartel banner on it so that everyone knew who masterminded the inventions on the warboat. This may mean that Ricket joined the Bilgewater Cartel and the Horde or that she was just hired by the Bilgewaters to build the boat.