[Fern]

You can summon the Railgan robot onto bushes in fights. Just get an encounter with a big green bush and target it with the Deploy Railgan skill if you'd like to see it in action.
 
This can lead to silly situations like mobs trying to reach a Railgan inside a bush and awkwardly ending their turns.

[Neus]

This was the case for all the Engineer bots. It's been corrected.