Teammate relationship favorability in "Dragon Age: Shadowkeep" is a very important attribute in the game, and the purpose of improving teammate relationship is to have an additional relationship quality level when you upgrade it to the highest level. Described as "the highest level of focus and commitment possible for a member of the Shadow Barrier Guardians".
What is the use of improving teammate relationships in Dragon Age 4
The maximum relationship level you can achieve with any character is ten.
Reaching level ten takes a lot of effort, so if there's a character whose relationship level you really want to maximize, it's best to keep them in your party as much as possible.
While the progression from 1-10 is the same for all characters, the names assigned to each level are different for each character. Often, they are related to the background of the partner in question.
There is an additional level of relationship quality before you reach level ten. Described as "the highest level of focus and commitment possible for a Shadowkeeper member," the Shadowkeeper hero status can also be seen on the companion screen.
This is very important at the end of the game and affects key choices you make, unlocking legendary gear for that character and giving you access to new skills.
To achieve Shadow Guardian heroic status, you need to complete that character's personal side quests. Once you achieve this status, you will also see a small icon next to your partner when selecting your team before selecting a mission.
