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|Affiliates||Starfy, Starly, Moe, Koraru|
|First Appearance||Densetsu no Stafy 4|
Materu is a cute pink fish from the Amy Kingdom who first appeared in Densetsu no Stafy 4, where she seeks Starfy's help in saving her homeland from evil invaders. Starfy apparently has a very strong crush on her. originally, she married Koraru, leaving Starfy with depression.
- She is one of the few characters to have a voice actor and is heard that she tells Starfy not to give up, but this only seen in the Densetsu no Stafy 4 commercial.