Roman Semenov is a 23-year-old semi-professional sports person whose life is dominated by solving the murder of his half brother, Preston Ruiz. Preston was shot in 2016 and the killer was never brought to justice.
He is Ukrainian who defines himself as straight. He finished school and then left academia.
Physically, Roman is in pretty good shape. He is average-height with pale skin, copper hair and green eyes.
He grew up in a working class neighbourhood. Having never really known his parents, he was raised in a series of foster homes.
He is currently single. His most recent romance was with an admin assistant called Sylvia Maja Miller, who was 3 years older than him. They broke up because Sylvia couldn't deal with Roman's obsession with Preston's death.
Roman's best friend is a semi-professional sports person called Nevaeh Nelson. They get on well most of the time. He also hangs around with Jean Thomas and Jerry Henderson. They enjoy binge-watching boxed sets together.