The term 'anxious one' can be described by two crossword solutions: ALARMIST (8 letters) and WORRIER (7 letters). An ALARMIST is someone who is overly concerned about potential danger or disaster, often to the point of exaggerating the situation. A WORRIER is someone who is constantly anxious or worried about something, often without good reason. Both terms refer to people who are excessively anxious or fearful about a situation.