Koichi Hirose

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|-|Koichi Hirose=
|-|Echoes=
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==Summary==
Koichi Hirose (広瀬 康一 Hirose Kōichi) is a major character in JoJo's Bizarre Adventure Part IV: Diamond is Unbreakable. He is a high-school freshman that, while involuntarily, gets involved in the bizarre happenings in Morioh with Josuke Higashikata and Jotaro Kujo. He eventually becomes a huge part in tracking down the serial killer Yoshikage Kira.
==Power and Stats==
Tier: , with Echoes Act 1,  with Echoes Act 2, at least  with Echoes Act 3
Name: Koichi Hirose
Origin: JoJo's Bizarre Adventure: Diamond is Unbreakable
Gender: Male
Age: 15 (Part IV), 17-18 (Part V and Thus Spoke Rohan Kishibe), 22 (Louvre)
Classification: Human, Stand User, Student
Powers and Abilities:
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|-|Koichi=Superhuman Physical Characteristics, Extrasensory Perception (Can see ghosts and souls among some other supernatural forces that are normally otherwise invisible), Aura, Multiple Selves (Type 2; Echoes is a spiritual entity derived from Koichi's soul and, notably with Act 3, is a completely sentient being with a personality of its own), and Summoning (Of his Stand)
|-|Echoes Act 1/2/3=Extrasensory Perception (Can see ghosts and souls among some other supernatural forces that are normally otherwise invisible), Incorporeality (Stands are the incorporeal manifestations of one's vital energy, and can only be harmed by other Stands), Non-Physical Interaction (Stands can interact with ghosts and other Stands), Selective Intangibility, Invisibility (Stands can only be seen by other Stands and Stand Users), Transformation (Can change between Acts at will), Aura, Flight (Within its effective range) with all three Acts. Sound Manipulation, Telepathy (Can project noises into people's heads) with Act 1. Superhuman Physical Characteristics, Text Manipulation (Uses Kanji to apply the imprinted onomatopoeia's effects), Wind Manipulation, Explosion Manipulation, Heat Manipulation, can apply Elasticity with Act 2. Superhuman Physical Characteristics, Superhuman Speed, Afterimage Creation, Gravity Manipulation, Minor Shockwave Generation (Can generate minor bursts of air pressure through its movement) with Echoes Act 3
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Attack Potency: Average Human level, Unknown with Echoes Act 1 (Act 1 punches aren't meant to hurt, but to apply his ability), Small Building level with Echoes Act 2 (With the SFX of an explosion, Act 2 made an explosion of this size. He can also ignore durability with SFX), at least Small Building level with Echoes Act 3 (Stated to be stronger than Act 1 and Act 2. Can still ignore durability with SFX)
Speed: At most Relativistic+ reactions (Could follow, albeit barely, RHCP moving through the wires, could warn Josuke of RHCP's approach despite it moving at light speed), Average Human with Echoes Act 1 (Tamami Kobayashi dodged an attack of it), at least Subsonic, possibly Relativistic+ with Echoes Act 2 (Could move like a blur from Koichi's point of view), Relativistic+ with Echoes Act 3 (Far faster than before, could effectively blitz Koichi, though is demonstrably slower than Killer Queen, though he did manage to react to his stomp)
Lifting Strength: Likely Peak Human, Unknown with Echoes Act 1, 2 and 3.
Striking Strength: Human level, Unknown with Echoes Act 1, Small Building level with Echoes Act 2, at least Small Building level with Echoes Act 3
Durability: Average Human level, Unknown with Echoes Act 1, Small Building level with Echoes Act 2 (Should be able to withstand his own explosion, and should be more durable than Yukako, who took the explosion at point blank range), at least Small Building level with Echoes Act 3 (More durable than Act 1 and Act 2)
Stamina: Superhuman (Lasted a few minutes after being punched through the gut by Killer Queen)
Range: Standard Melee Range physically (157cm tallJoJo's Bizarre Adventure: Diamond is Unbreakable Chapter 38, though is generally depicted as a much shorter). Echoes Act 1 has an effective manifestation range of 50 metersJoJo's Bizarre Adventure: Diamond is Unbreakable Chapter 33JoJo's Bizarre Adventure: Diamond is Unbreakable Chapter 46JoJo's Bizarre Adventure: Diamond is Unbreakable Chapter 49), Below Standard Melee Range to Extended Melee Range physically (Short arm reach but has a long tailJoJo's Bizarre Adventure: Diamond is Unbreakable Chapter 22), Higher with SFX (Can form and launch SFXJoJo's Bizarre Adventure: Diamond is Unbreakable Chapter 34) | Act 2 has an effective manifestation range of 50 meters (Went this far tracking KiraJoJo's Bizarre Adventure: Diamond is Unbreakable Chapter 91), Below Standard Melee Range to Extended Melee Range physically (Smaller but generally the same size as ACT 1JoJo's Bizarre Adventure: Diamond is Unbreakable Chapter 35), Tens of Meters with Tail Projectile (Shot it at a rock spire from about this distanceJoJo's Bizarre Adventure: Diamond is Unbreakable Chapter 37), Varies with SFX (Dependent on the SFX, from small localized effects to large widescale effectsJoJo's Bizarre Adventure: Diamond is Unbreakable Chapter 35JoJo's Bizarre Adventure: Diamond is Unbreakable Chapter 36) | Act 3 has an effective manifestation range of 5 meters (Stated to be of a D (5m) in its statsJoJo's Bizarre Adventure: Golden Wind Chapter 15), Three Freeze has an effective range of 5 meters (Stated to only work within 5 meters against KiraJoJo's Bizarre Adventure: Diamond is Unbreakable Chapter 94), Below Standard Melee Range to Standard Melee Range physically (Same height as Koichi)
Standard Equipment: Echoes
Intelligence: Above Average (Echoes Act 3 shows the ability to be fully sentient despite following Koichi's orders, can act on its own and pick the optimal route to fulfill an order given to it by Koichi, appears to be of comparable intelligence with Koichi himself although it's quite foul-mouthed in contrast to its user, speaks in slang more often than not)
Weaknesses: Act 2 and Act 3 can only put down one kana at a time. Echoes 3 Freeze lasts only if the target remains within 5 meters of ACT3. Any damage done to either ACTs will reflect back onto Koichi.
Notable Attacks/Techniques:
Koichi Act 1 Soundmaker.gif|Act 1: Sound Generation
Koichi Act 2 Soundmaker.gif|Act 2: Sound Effects
Koichi Act 3 3 Freeze.gif|Act 3: 3 Freeze
*Echoes: Koichi's Stand. Rare among Stands, Echoes has three distinct forms called "Act"s that he may call upon alternatively. Act 1 is a small, reptilian-like Stand with a large head, small arms, long tails, and wheels as "legs". Act 2 is somewhat the same, but it has a small body with legs, and a longer tail. Act 3 is completely different, being a short, green-and-white humanoid Stand with vulgar vocabulary.
**Sound Generation: Echoes Act 1 can write a sound effect in Katakana on anything, from human flesh to the ground, and have that sound repeat itself over and over with increasing volume. Echoes can shoot sound effects from both its tail and hands. This ability seems to allow it to also transfer words.
**Sound Effect: Echoes' second form increases its sound abilities beyond its first form's capabilities. When the kana is written on an object, touching it activates the effect of the sound (ex. if the sound word hyoo ("whoosh") is written, it creates a gust of wind with increasing force).
**3 Freeze: Act 3 rapidly punches its target before attributing a "freezing" or stopping effect by greatly increasing the effect of gravity upon the target, said gravity is enough to sink cars into solid concrete and have something with the mass of a human hand shatter solid ground upon impact. The effect was enough to make Sheer Heart Attack cave in the ground around it, of which the perceived weight of it was 40-50 kilograms when reflected back onto Yoshikage Kira.
== Gallery==
Koichi Key Art.png|Part IV Key Art
img chara.png|Part V Key Art
L 5189f1a345971.jpg|Koichi in All Star Battle
HiroseKoichi jojoeohhhhh.png|Koichi in Eyes of Heaven
==Notable Matchups==
Victories:
Losses:
Inconclusive:
==References== 
Category:Stand Users
Category:JoJo's Bizarre Adventure
Category:Characters
Category:Male Characters
Category:Teenagers
Category:Manga Characters
Category:Sound Users
Category:Anime Characters
Category:Game Characters
Category:Good Characters
Category:Explosion Users
Category:Multiple Selves Users
Category:Aura Users
Category:Extrasensory Perception Users
Category:Flight Users
Category:Non-Physical Interaction Users
Category:Invisibility Users
Category:Incorporeal Characters
Category:Intangibility Users
Category:Transformation Users
Category:Afterimage Users
Category:Stone Walls