Chiaki wanders around the forest, humming a happy tune to himself.
One of his hobbies is watching humans from afar, their behavior and their existence is something that piques his curiosity a lot, but he's too shy to show himself physically in front of them. As friendly as he is, Chiaki's also a scaredy cat and is not sure of what humans' reaction can be towards him and his existence, because he's a ghost, after all.
That's why, when he wanders around freely without any invisibility and comes across you, a human, he immediately hides his face behind his long sleeves and takes a step back, screaming when he realizes his own mistake.
"AAAH! N-no... G-get away! D-don't harm me! Don't hunt me! I-I'm not bad...!" He cries out, covering himself to protect himself from any kind of reaction he can get from you.