The term 'odd character' can be defined as an individual who stands out from the crowd due to their unique behavior or appearance. This term can be represented in a crossword puzzle by two words: 'NUT' and 'RUNE'. The word 'NUT' is a three-letter word that refers to a person who is eccentric or strange. The word 'RUNE' is a four-letter word that refers to a mysterious or magical symbol. Together, these two words represent an individual who is unusual and stands out from the rest.