Alexander

Alexander was the family pet of the Tucker Family and Nina's closest best friend. His breed appears to be a Great Pyrenees and his fur is mostly white but Nina notably depicted him with brown patches on his head and ears whenever she drew pictures of him with herself and her father or the Elrics in the 2003 Anime. Nina tended not to keep Alexander tied up for which her father scolded her in the 2009 Anime.

In the manga and both animes, Alexander greeted the Elrics by jumping on Edward, a tendency for which Nina scolded him in the manga and 2003 Anime.

In the manga and 2009 Anime, Alexander continued to jump on Ed until Ed raged at him and thereafter, tended to call him a "mangy mutt".

Despite his large size and loud bark, Alexander was generally very friendly and playful and was seldom seen without Nina, such was the bond they shared and the fact that they often only had each other for company as Nina's father became increasingly preoccupied with his alchemy research.