Welcome to NGB and our Xenoblade Chronicles X: Definitive Edition walkthrough for the Soldier of the Harriers affinity mission! This guide will cover everything you need to know to easily complete this quest, including how to start the mission and the steps you will need to take to finish it.
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How to Start the Soldier of the Harriers Affinity Mission
In Xenoblade Chronicles X: Definitive Edition, affinity and main story missions are unique in that you can only undertake one at a time. If you begin an affinity mission, you won’t be able to start a main story mission, and vice versa. Furthermore, you can only have one affinity or story mission active at any given time.

The Soldier of the Harriers affinity mission in Xenoblade Chronicles X: Definitive Edition can be found in NLA’s Administrative District. The recommended level for this mission is 33, and the required level is 30. To begin this mission, you must complete Chapter 7. The primary destination is Sylvalum.
Soldier of the Harriers Overview
Doug approached you with something of a tasty tale. Join him on an indigen hunt.
Objectives
- Talk to Doug at the Diner in the Industrial District
- Head to Sylvalum’s Sandsprint Slope
- Defeat Six Rotund Caro at Sylvalum’s Sandsprint Slope
- Head into the Depths of Sandsprint Slope
- Talk to Doug on West Melville Street in the Commercial District
Soldier of the Harriers Walkthrough

After accepting this mission, head to the Repenta Diner in the Industrial District. Once you’ve arrived, go to the east side of the building to locate Doug and then speak with him. He’ll then go over the details of the mission. Afterward, the game will prompt you to add him to the party.

Next, travel to Sylvalum and head for the Sandsprint Slope, which can be found on the northwest side of Lake Ciel. When you reach the location of the objective marker on the map, an event will trigger, leading to a battle against 6 level 29 Rotund Caros.
Once the enemies have been defeated, head up the slope and take a right to trigger another event where you’ll encounter the pack leader, a Stout Caro. This will lead to a battle against the level 33 Indigen. After taking care of the beast, a cutscene will trigger.

Now that the job is done, return to NLA and speak with Doug in the Commercial District. You can find him in the outdoor seating area of Army Pizza. This will complete the mission.
Completion Rewards
As a reward for completing the Soldier of the Harriers affinity mission, you’ll receive the following:
- Experience x280
- Reward Money x100,000
- Photon Saber Art “Phenomenon”
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