I really approve of the artist's choice of Pokémon for Iroha and Sana, particularly for the latter. A gentle giant like Torterra totally fits the shy shielder.

I guess Yachiyo and Tsuruno would have the other two starters, respectively Empoleon because of the dignified and cold as steel water-user and Infernape because of the passionate and nekketsu fire-user, but I wonder what Sinnoh Pokémon would fit Felicia.