How many movies have Michiko Neya and Mitsuki Saiga acted in together?

They have worked on 4 movies together! Their first movie together was Fullmetal Alchemist the Movie: Conqueror of Shamballa (2005) while their highest rated movie together was Gurren Lagann the Movie: Childhood's End (2008). They have not worked together since Mobile Suit Gundam 00 Special Edition III: Return The World (2010). They are most known for their animation films together.