Mami Koyama is a veteran seiyu from Aichi Prefecture who is best known in voicing Arale in Doctor Slump, Ryoko in UruseiYatsura, Launch in DragonBall, Balalaika in BlackLagoon, Ophicius Shaina in SaintSeiya, and Kycilia Zabi in Anime/MobileSuitGundam. She likes to be pigeonholed in LadyOfWar, TheBaroness, and FemmeFatale roles and enjoys playing these types too. She also played against type, like Arale in Doctor Slump. Sometimes, she plays HotMom roles, too.

She had a [[RelationshipVoiceActor relationship]] with TohruFuruya, like in Anime/MobileSuitGundam, UruseiYatsura, DragonBall, SaintSeiya, and CasshernSins. To a point that they even married. Their marriage failed, [[AmicableExes but they stayed friends.]]

!!Notable roles by Mami Koyama:

* Balalaika in ''BlackLagoon''
* Franchise/{{Gundam}} series:
** Kycilia Zabi in ''Anime/MobileSuitGundam''
** Karen Joshua in ''[[Anime/MobileSuitGundamThe08thMSTeam The 08th MS Team]]''
** Talia Gladys in ''[[Anime/MobileSuitGundamSeedDestiny Gundam SEED Destiny]]''
* Arale Norimaki in ''DrSlump'' (the character later made a special appearance in ''DragonBall'')
** Launch in ''DragonBall'' and ''DragonBallZ''
* Chiren in ''BattleAngelAlita''
* Sharon Vineyard/Vermouth in ''DetectiveConan''
* Ryoko Mendou in ''UruseiYatsura''
* Esmeraude in ''SailorMoon R''
* Minky Momo in ''MagicalPrincessMinkyMomo''
* Remy Shimada in ''GoShogun''
* Midori Fujimiya in ''{{Gaiking}}'' (her debut role)
* Eva Heinemann in ''{{Anime/Monster}}''
* Kei in ''Manga/{{Akira}}''
* Ophiuchus Shaina in ''SaintSeiya'' (Pre-Hades Chapter - Inferno, succeeded by Yuka Komatsu). She reprises her role in ''Anime/SaintSeiyaOmega''
* Josephine "Jo" March in the first ''LittleWomen'' anime series (''not'' the WorldMasterpieceTheater version; that one has Eiko Yamada as Jo).
* Annie Brighton in ''CandyCandy'' (succeeded by YumiTouma in the 1992 movie)