The co-op mode in Genshin Impact has its own set of unwritten rules within the player community.
Co-op is an indispensable feature in Genshin Impact. For low-level players, facing bosses or domains often requires the assistance of friends. Multiplayer mode can provide enjoyable experiences, but lacking these 'unspoken rules' can lead to frustration.

Ask Permission Before 'Borrowing' Resources
Many co-op players join others solely to obtain resources. While this can be understandable, silently 'snatching' everything without a word is considered impolite. Players engaging in such behavior might find themselves swiftly kicked from the co-op mode or even exposed on a forum.

Therefore, when looting resources from someone else's world, ask for permission first. Even if you can freely access their Serenitea Pot, consulting them before making any purchases is a Genshin player's etiquette.

Always Accompany Each Other

Some unspoken rules for a more enjoyable co-op experience in Genshin include always journeying alongside the world host, even if your level far exceeds theirs. They'll need assistance in exploration, opening treasure chests, engaging in battles, or solving puzzles. Moving too far apart is akin to 'each to their own,' 'might makes right,' causing both sides to feel bored and irritated during co-op.
Patience in Teambuilding for Domain Challenges

Patience is the first thing hosts must learn when tackling Domain Challenges in co-op. Entering co-op mode for domain farming may require a long wait for a complete team, or for others to finalize character choices and preparations. If you're not the host but a participant, don't be neglectful during the wait, so others don't have to invite you multiple times.
Choosing Appropriate Characters
Co-op domain challenges in Genshin Impact, one of the most common activities in the game, bring about situations that test players' patience, frustration, or even lead to arguments. To make the gaming experience less 'toxic,' players should choose characters that suit the team.
Most teams typically require at least one DPS, support, and an indispensable Healer. Therefore, players must be flexible in character selection, not solely focusing on their preferred DPS or personal favorites that may not suit the team.

Situations like someone flaunting a newly acquired gacha character without proper gearing, arguing with a teammate who chose a similar character, or an entire team stubbornly devoid of a healer are common reasons for co-op teams quickly falling apart, sometimes unable to complete a single challenge.
Wait for Teammates to Enter the Arena
If you're the world host, when facing domain challenges, always wait for teammates to be fully present in the challenge area before starting. Once the battle commences, there will be a surrounding barrier, and players who haven't entered in time will be locked out.

Therefore, waiting for a full team before starting a challenge is a 'core principle' for Genshin players in co-op. Sometimes, having just one player left outside can lead to the entire team's defeat. Even if the challenge is successful, being locked out while teammates are in battle is not ideal.
