Rein started to get fragmented information about how his symbol worked and in about a week, he was able to understand his ability a little bit. The information that he got was not really detailed. So even after learning about his symbol, Rein did not become an expert at using this symbol of his.
So his ability from this symbol could be represented with three pairs of concepts. They were hot and cold, fire and ice, then finally cheerful and depressed. So basically it was the combination of three pairs of opposite words.