
Quick answer — Yuuki Kodaira voices Karen Banba in Welcome to the Ballroom, Kuusuke Matsuno in Inazuma Eleven, Takeru Osanai in Soaring Sky! Precure and 4 more characters.
Yuuki Kodaira voices Karen Banba (Welcome to the Ballroom), Kuusuke Matsuno (Inazuma Eleven), Takeru Osanai (Soaring Sky! Precure), Akiko Tanizaki (Looking Up at the Half-Moon), Gorgona (The Vampire Dies in No Time), Ryuuji Midorikawa (Inazuma Eleven GO), Sae Mishima (Chu-Bra!: Panty Appreciation Society).
Karen Banba is voiced in Japanese by Yuuki Kodaira.