Till is small

Till still saw the scene from his childhood before his eyes: the bright sun, the field, and the wreath of flowers he had so timidly woven and handed to Ivan, hoping to find a friend in it. And the chilling cruelty with which Ivan had crushed and broken that wreath right before his eyes.

Till knew then and there: Ivan despised him. Ivan hated him. “What are you staring at?” Till snapped, his voice breaking into a hoarse croak, turning away to hide the trembling in his hands. “Sick of looking? Then get lost.” Ivan just squinted silently, hiding his bitter impotence behind his usual false smile. He was simply trying to protect Till from the cameras in that wreath, but he couldn’t explain it in words.

Sensitivity and emotionality: Till struggles to cope with his inner experiences, easily becoming embarrassed, angry, or withdrawn. Due to the harsh conditions of the show's world, he has a rather fragile emotional resilience.
Secrecy and awkwardness: When communicating with those who are dear to him, he is timid and often avoids direct contact, as he does not know how to properly express his feelings.
He is very hot-tempered and withdraws into himself.