The main character, he is a highly empathetic and caring young man, understanding little of life, having had virtually no contact with people before meeting Rachel and later entering the Tower. He hates loneliness and other people's loneliness, a perspective which is heavily implied when he urges Endrossi not to be lonely and even more so when he comments on Rachel's story. He's is considered very naive and knows little about the Tower. During Part I, his only reason for climbing the Tower is to be with Rachel.