Koichi Hirose

Koichi Hirose is a fictional character from the Japanese manga JoJo's Bizarre Adventure.

Story
Koichi is a young frist year high school student. Despite his age, he is very short and is about one third the size of Josuke. At first, he seemed to take the place of best friend for Josuke Higashikata but he was quickly replaced by Okuyasu Nijimura. Throughout the series, he makes a friendship with Jotaro Kujo. He is featured as a main character in Part IV and makes an appearance at the beginning of Part V.

Stand
Echoes Acts 1,2,3

Unlike most other Stands, Echoes has three distinct forms, or Acts (Koichi can only call upon one at any given time). Act 1 resembles a flying (although wingless) turtle with a long tail and wheels surrounding its beak. Its power is to write a given sound effect in kana on a surface. The effect will then constantly sound with increasing volume, until Echoes dispels the writing. Until his confrontation with Yukako, this was the only Act that Koichi could access. During that battle, he gained access to Act 2, which has a more humanoid form. Rather than just making sounds, Act 2's tail can create sound effect writings that actually invoke the associated quality when activated (e.g. if "whoosh" is written, activation will create an actual wind current). Finally, during his first confrontation with Kira, Koichi discovered Act 3, a completely humanoid Stand with turtle shell-like bosses on its body (and a somewhat independent, foul-mouthed personality who quotes Bruce Willis from Die Hard). Unlike the first two Acts, Act 3 cannot fly, and has a much shorter active range. However, it is extremely fast, and can "freeze" any one thing within 2 meters by rapidly punching it, at which point the object will suddenly become extremely heavy (it even caused Sheer Heart Attack to sink into solid pavement).