"Shaker"

One of the "Treelings" that Hadley Messer and Professor James Short encountered when entering the canopy surrounding the vault. It's form of communication consisted of body movements and sounds similar to shaking leaves. (Due to the Treelings not using names themselves it has been identified as "Shaker" for ease of reference). Once "Speaker" was interacting with the characters it moved onto a tree and merged with it. It's shape could be made out but mostly due to having seen it move into place, conveying the idea that the canopy itself might be made up of many more Treelings.