A messy sketch by pencil.
My headcanon - during Ishval war, Riza had her own tent because she was the only women throughout the snipers. One night, an Ishvalan sneaked in her tent and tried to kill her, but she blocked his attack and killed him. After hearing this, Roy silently came to Riza's tent every night and stayed outside to protect her without letting Riza know. One day Riza woke up earlier and came outside her tent and saw Roy was sleeping there. She then discovered his action every night before.
Riza Hawkeye (c) Hiromu Arakawa
Roy Mustang (c) Hiromu Arakawa
From Fullmetal Alchemist manga/anime