Lingering Resentment

Lingering Resentment is a Blade Quest in Xenoblade Chronicles 2. It can be received by going to Olethro Ruins (location) in Olethro Ruins in the Kingdom of Uraya, after starting and unlocking T-elos's fourth Key Affinity reward, provided Nia, Tora, Mòrag, Zeke, Pyra and T-elos are in the party. Completing it will unlock T-elos's fifth Key Affinity reward.

Quest objectives

 * Defeat the Indoline survivors (3) at the Olethro Ruins in Uraya.
 * Speak with the defeated warrior monks at Uraya's Olethro Ruins and extract information from them.
 * Only the survivor closest to the ruins' entrance needs to be interrogated.
 * Head for the place where the Indoline survivors are gathering forces, in Mor Ardain's Chansagh Wastes.
 * Defeat the Indoline survivors (4) at the Chansagh Wastes in Mor Ardain.
 * Vindictive Levalion is accompanied by two Indoline Avengers and one Indoline Falchion.
 * Defeat the Indoline survivors (4) at the Chansagh Wastes in Mor Ardain.
 * Bedeviled Vassail is accompanied by an Indoline Avenger and two Indoline Ganalle.

Results
"With help from T-elos, the Indoline survivors' plan to avenge Amalthus has been stopped before fruition."