That's not a coincidence. Kugimiya Rie is the voice actress for Taiga and Louise, as well as Shana, Sanzenin Nagi (from Hayate no Gotoku), and many others.
She gets typecast like that disturbingly often, to the point that her fans have nicknamed her "tsundeRie" - a nod to the fact that nearly all her characters are tsundere archetypes through and through.
sgcdonmai said: That's not a coincidence. Kugimiya Rie is the voice actress for Taiga and Louise, as well as Shana, Sanzenin Nagi (from Hayate no Gotoku), and many others.
yes, and You Horie is the same seiyuu for Minori as well as Siesta.