
Quick answer — Ryouko Nagata voices Éclair in Kiddy Grade, Mimiko Katsuragi in Black Blood Brothers, Noel in Mermaid Melody: Pichi Pichi Pitch and 2 more characters.
Ryouko Nagata voices Éclair (Kiddy Grade), Mimiko Katsuragi (Black Blood Brothers), Noel (Mermaid Melody: Pichi Pichi Pitch), Wina Lightning (LASTEXILE -Fam, the Silver Wing), Keita no Haha (Yo-kai Watch).
Éclair is voiced in Japanese by Ryouko Nagata.