Edward Elric <- apparently. I don't know this series. I just like the drawing.
Riza and Roy
fuhrer king bradley aka wrath, FMA
Greed <3 Anime: Fullmetal Alchemist Brotherhood
The Elric Brothers, Alexandre Chaudret on ArtStation at https://www.artstation.com/artwork/the-eldric-s-brothers
Rin Okumura || Ao no Exorcist × Blue Exorcist
Armstrong siblings _Fullmetal Alchemist Brotherhood