Once you beat the Dark Elf Astos and retrieve her crystal eye, she gives you the potion needed to wake the Elf Prince and leave the first area of the game’s world. Bats flit around her lair while Fantasia-style brooms sweep up, speak in riddles if you investigate them. Matoya started out as a pretty typical witch-type character in the original Final Fantasy-you meet her after the first boss, looking for the crystal ball she needs to see, which has been stolen from her cave.
There are multiple witches in Final Fantasy under the name Matoya.