CROW

CROW is the killer robot version of Duck.

Personality
Like STRAWBERRY, CROW does not have much emotion, as his programming only allows him to wait for commands for his master, and then do so after receiving the command.

In the locked rooms
He was Duck. He got transformed into a killer robot by HAWKINS'S killer robot transformation bullet machine gun. He is now currently taking orders from HAWKINS in the Portal 2 rooms.

Relationships
STRAWBERRY: They were friends before they became killer robots, and they became killer robots at the same time.

HAWKINS: Thinks of him as his master, and makes sure he doesn't get hurt.