کویچی هیروسای

An ally and classmate who meets Jousuke when Joutarou is searching for him, resulting in the two becoming quick friends.

[Spoiler: His misadventures with Jousuke eventually cause him to take a hit from the Bow and Arrow and develop a Stand, Echoes, which evolves and gains various sound-related abilities over the course of the story.

Echo's abilities:

- Act 1. Enables him to write on any surface, causing the words or onomatopoeia to continuously repeat at various volumes.

- Act 2. Enables him to write a sound effect on any surface. If the word is touched, a special effect related to the sound effect is activated.

- Act 3. A humanoid Stand, facilitates conventional melee attack and the ability to "freeze" targets by ascribing them unbearable weight.]