Guard Rail

The Guard Rail, also known as Radio Gaga, is a minor rock animal that had appeared briefly in JoJolion. It is the final antagonist of the series, being the main antagonist of the Radio Gaga Incident arc.

Appearance
The Guard Rail looks simply like a normal guard rail. It has a second, true form, in which it appears with human eyes.

The Radio Gaga Incident (1941)
In the year 1941, someone hears a voice coming from a Guard Rail. As they investigate, they are only to be stripped of their clothes and disappeared into the Rail. All that was left, was their clothes and a foot. This later became known as the "Radio gaga incident ".

Present Day
In the present day Morioh, Lucy Steel enlists the help of Joseph Joestar, to help learn more about the Locacca. While investigating, Lucy learns that Joseph is related to Johnny Joestar, who has now been known as a saint. Guard Rail tries to eliminate the duo, but fails.

Trivia

 * Its name is in reference to the song of the same title, by the band Rock band,.
 * Guard Rail is the final antagonist of Part 8. (counting the flashback, it is the first as well. The flashback takes place long before Josefumi and Kira's flashback.)