roy mustang symbol - Google Search
Like the symbolism. Lots of snake and apple tattoos have an angry looking snake, which is not what I want to go for; knowledge is good.
Alchemical Symbols. Makes me think of Fullmetal Alchemist: Brotherhood.
Riza Hawkeye Back Transmutation Circle
Transmutation Circle Fullmetal Alchemist Anime by EpicShoppe
fullmetal alchemist mustang transmutation circle - Google Search
5 amazing anime tattoos 18
FullMetal Alchemist Brotherhood: Homunculus Ouroboros Temporary Tattoo