After your NPC is level 51, talk to Luto Mewrilah in Upper Jeuno (G-8) who instructs you to the hospital and speak with Monberaux (unequip your signal pearl before speaking with Monberaux).
Reportedly theres a problem with people not getting the cutscene from Monberaux and all he mentions is something about Wolfgang, the solution is to spam him (keep clicking on him) and you'll get it.
Go back and speak with Luto Mewrilah. After the cutscene, you find out your friend has gone to Qufim Island. (Be sure to have your signal pearl equipped, or you will not get the cutscene.)
Go to Qufim Island (E-6) and inspect the Giant Footprint for a cutscene and to spawn your NPC buddy and the NM Gigas named Ingaevon (level 53-55).
If it says, "There is a gigantic footprint here" after helping a friend with their quest, zone at the swirling vortex, zone back, and click the Giant Footprint again (This NM has a Repop timer if you do not get it after zoning wait a few mins then click again).
Once you have defeated the NM, speak with your NPC before doing /anything/ else or you can glitch this level cap quest in a way GMs are not able to reset (Unnecessary to click on the Footprint) and return to Luto Mewrilah for a cutscene.
