松元

Matsumoto Tamaki, born February 7, 1999 in Kanagawa Prefecture, Japan. She is a voice actress (seiyuu) and child actress affiliated with Theatre Academy.

(Source: AniDB)

She's not the main seiyuu of the following characters:

Miwako Mangetsu (young)

Cosette (3 years old)

Non-anime roles:

Kohana in "Kamen Rider Den-O" (Japanese)