Ana San Millán is a voice actor known for her work in Spanish-language dubs of anime series, particularly in Castilian Spanish. One of her notable roles is providing the voice for the character Billy in the animated series Transformers: Armada. Billy is a human character in the series, initially portrayed as a bully who later becomes an ally to the Autobots. In addition to her work on Transformers, San Millán is also recognized for her participation in the Ojamajo Doremi franchise. She is part of the Spanish dub cast for Mo~tto! Ojamajo Doremi, the third series in the franchise. While her role in this series is confirmed, the specific character she voices is not detailed in the available records. Information regarding her potential involvement in the Looking for Magical DoReMi film and other aspects of her career background remains undocumented in accessible sources.