真里歌

Marika is a Japanese singer-songwriter and lyricist.

She used to go by the names, "Sizuku", "Okuyama Mayo" and "Mar.na".

Mar.na Twitter account: https://twitter.com/MarnaOfficial

Not be confused with the similarly-named illustrator "Marika (茉莉花)" and another illustrator/scenario writer Maruki Bunge's "Marika (茉莉華)" alias.