Shipping: Encouraged by Quest Runners, to the extent that some player-adopted ships end up becoming the Official Couple for that quest.
Tear Jerker Often purposefully invoked by Quest Runners (the monsters ;-;)
The Woobie: Anyone with the name o'hAodha is one of some form or another thanks to their Crapsack World. Debatable as to who is what, and they have multiple but take your pick from the Woobie Spectrum. Also generally a staple for most Quest Protagonist, with some notable examples being Kade ([untitled Quest]), Ryoko (Familiar Quest), and recently Leto (Necromancy Quest).