The Ties that Bind (XC2)

The Ties that Bind is a Blade Quest in Xenoblade Chronicles 2. It can be received from Mamumu in Nharil Central Plaza in Alba Cavanich, Empire of Mor Ardain, during and after unlocking Vale's fifth Key Affinity reward, provided Nia, Tora, Mòrag, Zeke and Vale are in the party. Completing it will unlock the fifth level of Vale's Accursed Prison.

Quest objectives

 * Gather data about an apocalypse cult in Alba Cavanich in Mor Ardain.
 * Barulu and Nedward must be talked to.
 * Report to Mamumu in Nharil Central Plaza in Mor Ardain.
 * Head to the roofs in the Admar Storage Zone in Mor Ardain in the middle of the night.
 * Complete both objectives:
 * On the roofs of Admar Storage Zone, Mor Ardain, ask Enzozo about Mimin.
 * On the roofs of Admar Storage Zone, Mor Ardain, ask Zonori about Mimin.
 * Defeat the Gluttonous Pterix on the roofs in the Admar Storage Zone in Mor Ardain.
 * Investigate the ceremony occurring in the Wrecc Marshland in Gormott.
 * The part of Wrecc Marshland where the ceremony occurs can only be accessed by jumping down from Dewmist Crag.
 * Defeat the Ravenous Arachno in the Wrecc Marshland in Gormott.
 * Investigate the ceremony occurring in the Vault of Heroes in Spirit Crucible Elpys.
 * Defeat the Voracious Aspar in the Vault of Heroes in Spirit Crucible Elpys.
 * Report to Mamumu in Nharil Central Plaza in Mor Ardain.

Results
"Mimin escapes her fate as a sacrificial victim, and begins to mend her relationship with her mother."