The term 'IDS' COMPANIONS' can be solved by the four-letter word 'EGOS'. An ego is a person's sense of self-importance or self-esteem. It is often used to refer to a person's sense of pride or confidence in their own abilities. In psychology, the ego is seen as the part of the personality that mediates between the conscious and unconscious mind. It is responsible for reality testing and a sense of personal identity.