Tanos has always been reserved and guards his privacy. As the tale progresses we realise this is due to grief and hurt over a woman he believes abandoned him in his past. Once back on Valaris, he can no longer hide. We discover he was born on Valaris and attained Immortality there, after the woman leaves. When he discovers she was pregnant, his pain is magnified. It is hard for him to accept Rain is his son, and when he does, he knows forgiveness may escape him.