Duck

Duck is a Great Western Railway (GWR) 57xx Class 0-6-0 pannier tank engine with added sand boxes

It is unknown exactly where Duck was at the time of the explosion, but it is known what might have happened to him after the explosion. He arrived later with D10 and The Iron twin Dead killed by Beast before his Arrived, He backup try to escape from his Fallen GWR Friend when he looks up and saw It wearing a "concerned" face and then it Transform into its true form, Shaking before his Death.