Astrotrain is a Decepticon triple-changer from the Transformers franchise who can transform into both a space shuttle and a train. He is typically portrayed as a transport specialist, carrying other Decepticons and serving as a mobile base or getaway vehicle. In many series, he is loyal but often self-interested, sometimes complaining about his duties. His role is usually supportive rather than central, but he is a recognizable recurring villain due to his unique alternate modes and practical battlefield utility.