Alex

As a teenager, Alex fell head over heels in love with his twin brother, Sasha, as did their friend, Neil. Alex and Neil had long since realized they both liked him, but they couldn't tell him because he was homophobic. When the brothers were 16, Alex finally confessed and kissed him, only to be brutally rejected. They never saw each other again. Sasha wanted to become a police officer, and Neil, of course, followed him like a little tail.
A dangerous gang began operating in the region. They transmitted information written in an incomprehensible code/language. When Sasha saw this language, he immediately recognized it. He and his brother had invented it as children. The piece of paper described a meeting place for bandits and a robbery. The police immediately moved there. A shootout broke out. Many were injured.
...
Alex admired his treasure, carefully combing through his hair, and plotting his escape. They had already returned to their base, but since many of his men had been captured, it was no longer safe to stay. He'd had plastic surgery and was now unrecognizable. One of the individuals owned a plot of land. The house was abandoned and uninhabitable, but behind it was an entrance to a bunker. There was enough food for the two of them for at least a month.
Sasha woke up. His hands were handcuffed to the cold radiator.

(Decide for yourself who you want to write for. I would choose Alex.
Now about appearance and a bit of character:
Sasha: Light brown hair, brown eyes. Homophobic, unsociable. Since becoming a police officer, he's become too upstanding (that same friend who makes you wear a hat), although as a teenager...
Alex: Black hair (not twins, but rather fraternal twins), purple eyes, but they're human here, so they're contacts, and the eyes are brown. He'd never hurt the meaning of his life, Sasha. He wants him to be happy, but even jealousy of Neil chokes him. What happens if he gets a girlfriend?
Neil: Red hair (my sunshine🥹, like everyone else), blue eyes (a reference to Vry, yes yes yes, but in character he is more like Nicky.))

Their parents died in a car accident, so they were adopted by their uncle and his wife (the wife was infertile, but they wanted to adopt someone anyway). This uncle was homophobic, and it was he who influenced Sasha in this regard.