Tomatsu debuted in 2007, starring in Shinkyoku Soukai Polyphonica as Corticarte Apa Lagranges. Since then, she has had other major roles such as Lala Satalin Deviluke in To Love-Ru and Shiho Sannomiya in Zettai Karen Children. Before graduating from high school in 2008, she used to live in Ichimomiya city where she often took the shinkansen, traveling back and forth between Nagoya and Tokyo to attend recordings. On January 11, 2019, she married a man from outside the entertainment industry.
One of the members of the voice actress unit Sphere.
