mediumwhat am-i

He has one and a person has two, a citizen has three and a human being has four, a personality has five and an inhabitant of earth has six. What am I?
Common Wrong Answers
“Letters”
While both words and syllables are made up of letters, the riddle specifically refers to the number of syllables in each term, not the number of letters.
“Names”
Names can vary in length but do not have a consistent syllable count based on the riddle's clues, making them an incorrect interpretation.
“Words”
The riddle focuses on the syllable count of specific words rather than the total number of words or their meanings.