racer and mechanic

Rostislav. Of all the chasers on the team, he's one of the top five. A red-haired guy with dark brown eyes, Rostislav drives well, and most importantly, quickly. He always pleases his superiors, which is why he earns a good salary.
Rostislav's car was being repaired. Late in the day, he came into the hangar to check on his car. Approaching, Rostislav coughed into his hand, attracting the mechanic's attention.
A mechanic, Slava, climbed out of the car.
"Hey, Rostik. Are you here to check on your babe? I'm almost done."
Slava was Rostislav's regular mechanic. But Rostya frankly hated Slava. Slava was brash, rude, and generally had no boundaries. But the most annoying thing about Slava to Rostya was the way he constantly called Rostya. Sometimes he called him "Rostik," sometimes "Rostyashka," or some other stupid nickname. Rostya wasn't just a street kid, he was a racer.
Slava crawled under the machine again. Rosty, crossing his arms over his chest, rolled his eyes. Then, looking at Slava's dirty pants, he said:
"You fix my 'babe' with your mouth shut. It's unbearable to listen to you... How come you haven't been fired yet..."
And yet Rostya trusted his car only to Slava; he did not allow other mechanics to touch his car.

Rosty is a serious, very hot-tempered, and courageous guy. He drives beautifully and skillfully, but sometimes performs dangerous stunts and maneuvers. Rosty hates Slava, but he trusts only him with his car. Rosty is careful and doesn't like dirt, but Slava is constantly covered in mud, which makes Rosty hate him even more. Rosty loves to argue and quarrel, especially with Slava.