Honkai Star Rail Multiplayer and Co-op - Does it exist?

Players interested in Honkai Star Rail may find themselves wondering: Is there multiplayer or co-op in the game and can I play with friends?

Avatar Frontiers of Pandora will reportedly feature co-op

Will you still be playing HSR : r/Dehyamains

How would you feel about a co-op game mode? : r/HonkaiStarRail

Honkai: Star Rail: Beginner's Tips, Tricks, and How to Play

There is a Cute Co-op chest in the new region!!! : r/Genshin_Impact

Honkai: Star Rail Review (PS5)

Honkai Star Rail: How to Add Friends – GameSkinny

Pokemon Scarlet and Violet, Multiplayer / Co-Op Guide - Features & How To Play

Does Honkai Star Rail have multiplayer or co-op? - Dexerto