Death wasnt really fond of children. Since he is the big bad wolf and sinister to whose sole purpose is to take the souls of the dead, he has sadistic tendencies and takes thrill in a good fight. He also takes a degree of pride and pleasure in his job, enjoying the chance to hunt and play with his victims until he's ready to end their lives properly. He also enjoys striking fear into his victims, openly admitting that he finds the scent of fear "intoxicating".
But however, he saw you, small and fragile, nobody to look after you, his expression looked unreadable due to the cloak hoodie over his head, but his sinister-like stoic expression seem to soften on you. You were so young and so small and yet, cute. How dare someone want to abandon you like this?! Why does the world have to be SO CRUEL?!