Ami Matsuzaki

Ami, the protagonist of the Anime, is a five-year-old preschool student who has just moved into a new home and neighborhood with her family. She is intelligent and imaginative, but grounded and a bit easily flustered. The revelation that a gate to Ani-Yoko is in her room, and the increasingly bizarre actions of her three visitors, frequently drive her to the brink of total distraction, yet she seems to have gotten used to their presence, with Ami sharing some of her regular life with them. Her date of birth is 15th December.

(Source: Wikipedia)