Vella Act 2
This trophy is missable. In Act 2, Vella must use the Central Control Sphere to unlock the door to the Control Room. This gives her remote access to several of the ship's rooms where there are a total of eight sad Bassinostra faces that need changing to smiles. You can change them by clicking on the hexagon next to the sad face. Starting on the far left, this is where to find the Bassinostra.
Shay's Room - 1 Face
Kitchen - 1 Face
Corridor with access to the Avalanche and Friendship Circle missions - 5 Faces
Hallway with Maintenance Robot - 1 Face