Misa nevers changes out of her navy sailor suit. The only times she wears other costumes are (1) when she poses a nurse in "The Jealousy" and, (2) when she wears a kimono to bed in "Anri" and, (3) when she wears a dark robe to her employer's home in "The Dream".
The chant: "Eko Eko Azarak Eko Eko Zamilak Eko Eko Cernunnos Eko Eko Aradia" Translates to: "Hail Hail force of fire Hail Hail to the glory Hail Hail Cernunnos Hail Hail Aradia". It is an actual chant used at Wiccan rituals and is often called "The Witch's Rune".