Blaine the Mono

Blaine the Mono is a major antagonist in Stephen King's The Dark Tower Series. He was a pink train (monorail). Blaine made appearances in The Waste Lands and Wizard and Glass. He was alone so long that it drove him mad, and he even killed his counterpart, Patricia the Mono, because she complained too much. He was planning on killing himself before reaching Topeka, and then decided to bring Roland and his ka-tet with him.