How do you friend bow for explorers of the sky?

It sounds like you're asking about a specific gesture or action in the game "Explorers of the Sky". However, the term "friend bow" is not a recognized action or term in the game.

Could you be thinking of something else? Perhaps:

* A specific in-game action like shaking hands, greeting someone, or using a specific item?

* A gesture or pose that characters can make?

* A specific way to interact with other players in the game?

Please provide more context or details about what you're looking for, and I'll do my best to help you!